CN108775595B - Fire coal flue gas whitening, emission reduction and waste heat deep recovery device and system - Google Patents
Fire coal flue gas whitening, emission reduction and waste heat deep recovery device and system Download PDFInfo
- Publication number
- CN108775595B CN108775595B CN201810669287.5A CN201810669287A CN108775595B CN 108775595 B CN108775595 B CN 108775595B CN 201810669287 A CN201810669287 A CN 201810669287A CN 108775595 B CN108775595 B CN 108775595B
- Authority
- CN
- China
- Prior art keywords
- flue gas
- water
- heat exchanger
- air
- outlet
- 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.)
- Active
Links
Classifications
-
- 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
- F23J15/003—Arrangements of devices for treating smoke or fumes for supplying chemicals to fumes, e.g. using injection devices
-
- 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
- F23J15/006—Layout of treatment plant
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/08—Arrangements of devices for treating smoke or fumes of heaters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D15/00—Other domestic- or space-heating systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J2215/00—Preventing emissions
- F23J2215/20—Sulfur; Compounds thereof
-
- 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)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Combustion & Propulsion (AREA)
- Chimneys And Flues (AREA)
- Air Supply (AREA)
Abstract
The invention provides a device and a system for whitening, reducing emission and deeply recovering waste heat of coal-fired flue gas, which relate to the field of energy and comprise a flue gas desulfurization unit, a flue gas waste heat recovery unit, a flue gas-air total heat exchange unit and a flue gas whitening unit; the flue gas-air total heat exchange unit is arranged, so that the flue gas waste heat is recovered, and the moisture content of combustion air is increased, thereby increasing the dew point temperature of the flue gas; by arranging the flue gas waste heat recovery unit and the flue gas whitening unit, water vapor in the flue gas is condensed and recovered, and finally the moisture content of the discharged flue gas is reduced, so that the generation of white flue gas is reduced; the humidification degree of the air is increased, the combustion temperature can be reduced, and NOx and SO are reduced 2 Is discharged from the reactor; the technical problems that a large amount of waste heat of flue gas is wasted and a 'white smoke' phenomenon is generated in the prior art are solved; the natural cold source of outdoor air in winter is used as a main cooling and dehumidifying source, and the natural cold sources are mechanically coupled with each other to supplement each other, so that the effects of integrating functions of desulfurization, nitrogen reduction, waste heat recovery, white removal and the like are realized.
Description
Technical Field
The invention relates to the technical field of energy, in particular to a device and a system for waste heat deep recovery of coal-fired flue gas, which are particularly suitable for waste heat recovery of boiler flue gas and reduction of emission of sulfides and nitrogen oxides.
Background
The coal contains hydrogen and water, the boiler burns to generate a large amount of water vapor, 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-position heat productivity of the coal. Therefore, if the flue gas temperature can be reduced below the dew point, the latent heat of the flue gas can be recovered, and the method plays an important role in saving fuel consumption. On the other hand, the flue gas generated by boiler combustion contains a large amount of sulfur dioxide SO2 and nitrogen oxides NOx, which can cause air pollution, SO that effective measures are taken to reduce pollutant emission of the boiler flue gas, and the method has great significance for sustainable development of society. Meanwhile, the common wet desulfurization can cause the coal-fired flue gas to generate a phenomenon of 'white smoke' at a chimney mouth, and the white smoke contains a large amount of small sulfuric acid droplets, so that the harm is great, and therefore, the coal-fired flue gas is very necessary to be subjected to white elimination treatment.
In the prior art, the recovery of flue gas waste heat by utilizing the backwater of a heat supply network or air is a modern mature technology.
However, as the heat supply network has higher backwater temperature, small sensible heat capacity of air and mismatching with the change heat capacity of the latent heat of the flue gas, the two cannot deeply recover the flue gas waste heat, only the heat efficiency of the boiler can be improved by 3-5%, and a large amount of flue gas waste heat is still wasted. The existing heat pump is used for manufacturing cold sources for deep recovery of flue gas waste heat in a manual mode, the investment is large, the occupied area is large, outdoor natural cold sources in winter are rich in resources, such as outdoor dry low-temperature air, the natural cold sources are used for deep recovery of flue gas waste heat, the investment is small, and the economic benefit of environmental protection engineering is greatly improved. Moreover, the prior art is lack of technology, and the reduction of emission, the whitening and the deep recovery of waste heat of the smoke pollutants can be realized by integrating the same system flow.
Disclosure of Invention
The invention aims to provide a device and a system for eliminating white smoke, reducing emission and deeply recycling waste heat of coal-fired flue gas, so as to solve the technical problems that a large amount of waste heat of flue gas is wasted and white smoke is generated in the prior art.
The invention provides a fire coal flue gas whitening, emission reduction and waste heat deep recovery device, which comprises the following components: the flue gas desulfurization unit, the flue gas waste heat recovery unit, the flue gas-air total heat exchange unit and the flue gas whitening unit;
the flue gas desulfurization unit, the flue gas waste heat recovery unit, the flue gas-air total heat exchange unit and the flue gas whitening unit are sequentially communicated to form a flue gas passage;
the flue gas desulfurization unit is used for desulfurizing the flue gas discharged by the boiler and then transmitting the flue gas to the flue gas waste heat recovery unit;
the flue gas waste heat recovery unit comprises a steam-water heat exchanger, wherein the steam-water heat exchanger is used for transferring heat in flue gas to hot water, and the hot water after heat exchange is transferred to a hot water inlet of a boiler or a water supply pipeline of a heat user through a hot water outlet of the steam-water heat exchanger; the flue gas waste heat recovery unit is used for transferring the flue gas subjected to heat exchange to the flue gas-air total heat exchange unit;
the flue gas-air total heat exchange unit is provided with a first air inlet and a first air outlet, the first air inlet is communicated with the outside air, the flue gas-air total heat exchange unit is used for transmitting heat and moisture in the flue gas to the air, and the first air outlet is communicated with the boiler and used for supporting combustion in the boiler; the flue gas-air total heat exchange unit is used for transferring the flue gas subjected to heat exchange to the flue gas whitening unit;
the smoke whitening unit is used for enabling the water vapor content in the smoke to be in an unsaturated state, or is used for enabling the smoke to be mixed with the outside air and discharging the treated smoke to the outside.
Further, the flue gas desulfurization unit comprises a desulfurization spray tower, a pipeline and a water pump;
the bottom in the desulfurization spray tower is provided with a slurry pool, the slurry pool stores spray slurry containing desulfurization agents, the top of the desulfurization spray tower is provided with a spray header, the slurry pool is communicated with the spray header through a pipeline, and a water pump is arranged on the pipeline so as to circularly communicate the slurry in the slurry pool with the spray header through the water pump, so that the spray slurry containing desulfurization agents circularly sprays flue gas in the flue gas desulfurization unit;
the steam-water heat exchanger is communicated with the desulfurization spray tower through a hood;
the steam-water heat exchanger comprises a first inlet, a first outlet and a second outlet; the first outlet is used for overflowing and discharging water in the steam-water heat exchanger through a pipeline, and the first inlet and the second outlet form a circulating pipeline with hot water of the boiler or a water supply pipeline of a heat user through pipelines.
Further, the flue gas-air total heat exchange unit comprises a flue gas-water direct contact heat exchanger and an air-water direct contact heat exchanger;
the flue gas-water direct contact heat exchanger is communicated with the steam-water heat exchanger through a hood;
the flue gas-water direct contact heat exchanger comprises a second inlet, a third outlet and a fourth outlet; the air-water direct contact heat exchanger comprises a first air inlet, a first air outlet, a third inlet and a fifth outlet; the third outlet is used for overflowing and discharging water in the flue gas-water direct contact heat exchanger, the fourth outlet is communicated with the third inlet and used for transferring hot water of the flue gas-water direct contact heat exchanger into the air-water direct contact heat exchanger, the first air inlet is used for exchanging heat with the hot water by transferring outside air into the air-water direct contact heat exchanger, and the first air outlet is communicated with the boiler and used for supporting combustion in the boiler; the fifth outlet is communicated with the second inlet and is used for transmitting the cooled water into the flue gas-water direct contact heat exchanger to form an internal circulating waterway.
Further, the flue gas whitening unit comprises a flue gas-water dividing wall type heat exchanger or a flue gas-air heat mixer;
the flue gas-water dividing wall type heat exchanger is communicated with the flue gas-water direct contact type heat exchanger through a hood;
the flue gas-water dividing wall type heat exchanger comprises a fourth inlet, a sixth outlet, a seventh outlet and a discharge outlet; the sixth outlet is used for overflowing and discharging water in the flue gas-water dividing wall type heat exchanger, the fourth inlet and the seventh outlet form a circulating waterway with a water supply pipeline of a boiler or a heat user, the circulating waterway is used for transferring hot water of the water supply pipeline of the boiler or the heat user into the flue gas-water dividing wall type heat exchanger and heating the flue gas so that the water vapor content in the flue gas is in an unsaturated state, and the discharge outlet is used for discharging the heated flue gas to the outside;
or the flue gas-air heat mixer is communicated with the flue gas-water direct contact heat exchanger through a hood;
the flue gas-air heat mixer comprises a second air inlet and a second air outlet, wherein the second air inlet is used for transmitting external air to the flue gas-air heat mixer so that the flue gas in the flue gas-air heat mixer forms mixed gas, and the second air outlet is used for discharging the mixed gas outside.
Further, the steam-water heat exchanger, the flue gas-water direct contact heat exchanger and the air-water direct contact heat exchanger are any one of a cross-flow heat exchanger, a counter-flow heat exchanger or a concurrent heat exchanger.
Further, the steam-water heat exchanger is a direct contact heat exchanger or an indirect contact heat exchanger;
when the steam-water heat exchanger is a direct contact heat exchanger, the direct contact heat exchanger adopts a heat exchanger with a cavity structure or a heat exchanger with a filler structure;
distributing liquid of the heat exchanger water with the cavity structure through a spraying mechanism;
or, in the heat exchanger with the filler structure, water is distributed through a spraying mechanism or a tray spraying mechanism.
Further, the first inlet of the steam-water heat exchanger and the second inlet of the flue gas-water direct contact heat exchanger are both provided with spray water pipes, and the inlets of the spray water pipes are both provided with dosing ports so as to add the denitration agent into the steam-water heat exchanger and the flow waterway of the flue gas-water direct contact heat exchanger through the dosing ports.
Further, the flue gas-air total heat exchange unit comprises an N-level flue gas-air total heat exchange unit, wherein N is more than or equal to 1;
the flue gas outlet of the flue gas waste heat recovery unit is communicated with the first-stage flue gas-air total heat exchange unit, the flue gas outlet of each stage of flue gas-air total heat exchange unit is communicated with the flue gas inlet of the next-stage flue gas-air total heat exchange unit, and the flue gas outlet of the Nth-stage flue gas-air total heat exchange unit is communicated with the flue gas whitening unit to form a flue gas total heat exchange passage.
The invention provides a fire coal flue gas whitening, emission reduction and waste heat deep recovery system, which comprises a boiler, a flue gas-air heat exchanger, a water-water heat exchanger and a fire coal flue gas whitening, emission reduction and waste heat deep recovery device;
the boiler is communicated with the flue gas desulfurization unit through a flue gas-air heat exchanger;
the flue gas-air heat exchanger comprises a third air inlet and a third air outlet, the third air inlet is communicated with the first air outlet of the flue gas-air total heat exchange unit and is used for reheating the air heated by the flue gas-air total heat exchange unit and the flue gas of the flue gas-air heat exchanger, and the third air outlet is communicated with the boiler and is used for adding the air heated secondarily into the boiler to support combustion;
the water-water heat exchanger comprises a backwater inlet, a water supply inlet, a first water supply outlet and a second water supply outlet; the water return inlet is communicated with a water return pipeline of a heat user, the water supply inlet is communicated with a hot water outlet of the steam-water heat exchanger, and the first water supply outlet is communicated with a hot water inlet of the steam-water heat exchanger, so that low-temperature water in the water-water heat exchanger can output hot water with high temperature after passing through flue gas heat exchange in the steam-water heat exchanger; the second water supply outlet is communicated with a water supply pipeline of a heat user, a heating pipeline and a water return pipeline are arranged on the water supply pipeline and can be communicated with the smoke whitening unit, so that the smoke of the smoke whitening unit is heated by hot water in the water supply pipeline, and the water vapor content in the smoke is in an unsaturated state.
Further, a plurality of monitoring instruments are arranged on the connecting pipelines between the boiler and the flue gas-air heat exchanger, between the flue gas-air heat exchanger and the fire coal flue gas whitening, emission reduction and waste heat deep recovery device and between the fire coal flue gas whitening, emission reduction and waste heat deep recovery device and the water-water heat exchanger; the monitoring instrument is used for monitoring various information of the temperature, the humidity and the flow rate of water, air and flue gas which are arranged on a plurality of connecting pipelines and the concentration of smoke dust particles, oxynitride and sulfur dioxide through a multi-parameter control and adjustment method.
The invention provides a fire coal flue gas whitening, emission reduction and waste heat deep recovery device, which comprises the following components: the flue gas desulfurization unit, the flue gas waste heat recovery unit, the flue gas-air total heat exchange unit and the flue gas whitening unit; compared with the existing coal-fired flue gas waste heat recovery device, the flue gas-air total heat exchange unit is arranged, so that the moisture content of combustion air is increased, the dew point temperature of the flue gas is increased, and the flue gas waste heat can be recovered by using cold source water with higher temperature; by arranging the flue gas waste heat recovery unit and the flue gas whitening unit, water vapor in the flue gas is condensed and recovered, and finally the moisture content of the discharged flue gas is reduced, so that the generation of white flue gas is reduced; to make the flue gas inThe water vapor of (2) is condensed, the waste heat of the flue gas is deeply recovered, the flue gas is desulfurized, and meanwhile, the combustion air is humidified to effectively reduce the combustion temperature and reduce NOx and SO 2 Is discharged from the reactor; the temperature, the moisture content and the sulfide of the flue gas are obviously reduced, and the whitening effect is achieved; the technical problems that a large amount of waste heat of flue gas is wasted and a 'white smoke' phenomenon is generated in the prior art are solved; the natural cold source of outdoor air in winter is used as a main cooling and dehumidifying source, so that the functions of desulfurization, nitrogen reduction, waste heat recovery, white removal and the like are integrated, the functions are mechanically coupled with each other, the natural cold source and the natural cold source supplement each other, the system investment is low, and the economic benefit of energy conservation and emission reduction is good.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the principle and structure of a fire coal flue gas whitening, emission reduction and waste heat deep recovery system provided by the embodiment of the invention;
fig. 2 is a schematic structural diagram of another embodiment of a fire coal flue gas whitening, emission reduction and waste heat deep recovery system according to an embodiment of the present invention.
Icon: 1-a boiler; 2-a flue gas-air heat exchanger; 3-a fire coal flue gas whitening, emission reduction and waste heat deep recovery device; 4-water heat exchanger; 3 a-a desulfurization spray tower; 3 c-a steam-water heat exchanger; 3 e-flue gas-water direct contact heat exchanger; 3 g-a smoke whitening unit; 3 h-air-water direct contact heat exchanger; 3 b-hood; 3 d-hood; 3 f-a hood; L1-L20-pipe; S1-S14-monitoring instrument.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that, if terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like are used, the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, only for convenience of describing the present invention and simplifying the description, and does not indicate or imply that the indicated apparatus or element must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like, as used herein, are used for descriptive purposes only and are not to be construed as indicating or implying any relative importance.
In the description of the present invention, it should be noted that unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "connected" should 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 invention will be understood in specific cases by those of ordinary skill in the art.
Fig. 1 is a schematic structural diagram of a fire coal flue gas whitening, emission reduction and waste heat deep recovery system provided in this embodiment; the flue gas whitening unit comprises a flue gas-water dividing wall type heat exchanger;
fig. 2 is a schematic structural diagram of another embodiment of the fire coal flue gas whitening, emission reduction and waste heat deep recovery system provided in this embodiment; wherein the flue gas whitening unit comprises a flue gas-air heat mixer.
As shown in fig. 1-2, the device for whitening, reducing emission and deeply recovering waste heat of coal-fired flue gas provided in this embodiment includes: 3g of a flue gas desulfurization unit, a flue gas waste heat recovery unit, a flue gas-air total heat exchange unit and a flue gas whitening unit; the flue gas desulfurization unit, the flue gas waste heat recovery unit, the flue gas-air total heat exchange unit and the flue gas whitening unit 3g are sequentially communicated to form a flue gas passage; the flue gas desulfurization unit is used for transmitting flue gas discharged by the boiler 1 to the flue gas waste heat recovery unit after desulfurization treatment; the flue gas waste heat recovery unit comprises a steam-water heat exchanger 3c, wherein the steam-water heat exchanger 3c is used for transferring heat in flue gas to hot water, and the hot water after heat exchange is transferred to a hot water inlet of the boiler 1 or a water supply pipeline of a heat user through a hot water outlet of the steam-water heat exchanger 3 c; the flue gas waste heat recovery unit is used for transferring the flue gas subjected to heat exchange to the flue gas-air total heat exchange unit; the flue gas-air total heat exchange unit is provided with a first air inlet and a first air outlet, the first air inlet is communicated with the outside air, the flue gas-air total heat exchange unit is used for transmitting heat and moisture in the flue gas to the air, and the first air outlet is communicated with the boiler 1 and is used for supporting combustion in the boiler 1; the flue gas-air total heat exchange unit is used for transferring the flue gas subjected to heat exchange to the flue gas whitening unit 3g; the smoke whitening unit 3g is used for enabling the water vapor content in the smoke to be in an unsaturated state, or the smoke whitening unit 3g is used for enabling the smoke to be mixed with the outside air and discharging the treated smoke to the outside.
Specifically, the coal-fired flue gas whitening, emission reduction and waste heat deep recovery device provided by the embodiment is integrally provided with a flue gas whitening and waste heat recovery integrated tower, so that the effects of whitening flue gas and waste heat recovery are realized.
The flue gas desulfurization unit, the flue gas waste heat recovery unit, the flue gas-air total heat exchange unit and the flue gas whitening unit 3g are used as a plurality of treatment units of the gas whitening and waste heat recovery integrated tower, and can be communicated through a hood.
The steam-water heat exchanger 3c is an important application of a plate heat exchanger in heating, and the plate heat exchanger needs two substances to exchange heat to complete heat exchange, and the steam-water heat exchanger is a device for exchanging heat in steam of substance A into water of substance B to raise the temperature of the water.
Further, the flue gas desulfurization unit comprises a desulfurization spray tower 3a, a pipeline L7 and a water pump; the bottom in the desulfurization spray tower 3a is provided with a slurry pool, the slurry pool stores spray slurry containing desulfurization agents, the top of the desulfurization spray tower 3a is provided with a spray header, the slurry pool is communicated with the spray header through a pipeline L7, and a water pump is arranged on the pipeline L7 so as to circularly communicate the slurry in the slurry pool with the spray header through the water pump, so that the spray slurry containing the desulfurization agents circularly sprays flue gas in the flue gas desulfurization unit; the steam-water heat exchanger 3c is communicated with the desulfurization spray tower 3a through a hood 3 b; the steam-water heat exchanger 3c includes a first inlet, a first outlet, and a second outlet; the first outlet is used for overflowing and discharging water in the steam-water heat exchanger through a pipeline L11, and the first inlet and the second outlet form a circulating pipeline with hot water of a boiler or a water supply pipeline of a heat user through a pipeline L8.
Wherein, the desulfurizing agent generally refers to an agent for removing free sulfur or sulfur compounds in fuel, raw materials or other materials; in the control and treatment of pollutants, primarily means that sulfur oxides (including SO 2 And SO 3 ) The medicament used; various alkaline compounds can be used as desulfurizing agents; the desulfurizing agent for removing sulfur dioxide in flue gas adopts lime, limestone and alkaline solution prepared by calcareous agent as the most.
Specifically, slurry in the desulfurization spray tower 3a is circulated to spray flue gas through a pipeline L7, so that the flue gas is desulfurized.
Further, the flue gas-air total heat exchange unit comprises a flue gas-water direct contact heat exchanger 3e and an air-water direct contact heat exchanger 3h; the flue gas-water direct contact heat exchanger 3e is communicated with the steam-water heat exchanger 3c through a hood 3 d; the flue gas-water direct contact heat exchanger 3e includes a second inlet, a third outlet, and a fourth outlet; the air-water direct contact heat exchanger 3h includes a first air inlet, a first air outlet, a third inlet, and a fifth outlet; the third outlet is used for overflowing and discharging water in the flue gas-water direct contact heat exchanger 3e, the fourth outlet is communicated with the third inlet through a pipeline L12 and used for transferring hot water of the flue gas-water direct contact heat exchanger 3e into the air-water direct contact heat exchanger 3h, the first air inlet is used for exchanging heat with hot water by transferring outside air into the air-water direct contact heat exchanger 3h, and the first air outlet is communicated with the boiler 1 and used for supporting combustion in the boiler 1; the fifth outlet is communicated with the second inlet through a pipeline L13 and is used for transmitting the cooled water into the flue gas-water direct contact heat exchanger 3e to form an internal circulating waterway.
Specifically, ambient air enters an air-water direct contact heat exchanger 3h through an air pipeline L4, air at the outlet of the air-water direct contact heat exchanger 3h enters a flue gas-air heat exchanger 2 described below through an air pipeline L5, and air at the outlet of the flue gas-air heat exchanger 2 enters a boiler 1 through a pipeline L6 to support combustion, so that an air passage is formed;
the direct contact type heat exchanger, also called a hybrid type heat exchanger, is equipment for carrying out heat exchange by directly contacting cold and hot fluid; it is generally seen that one fluid is a gas and the other fluid is a liquid with a lower vaporization pressure and is easily separated after heat exchange.
Further, the flue gas whitening unit 3g comprises a flue gas-water dividing wall type heat exchanger or a flue gas-air heat mixer; the flue gas-water dividing wall type heat exchanger is communicated with a flue gas-water direct contact type heat exchanger 3e through a hood 3 d; the flue gas-water dividing wall type heat exchanger comprises a fourth inlet, a sixth outlet, a seventh outlet and a discharge outlet; the sixth outlet is used for overflowing and discharging water in the flue gas-water dividing wall type heat exchanger through a pipeline L15, the fourth inlet and the seventh outlet form a circulating waterway with a water supply pipeline of the boiler 1 or a heat user, the circulating waterway is used for transferring hot water of the water supply pipeline of the boiler 1 or the heat user into the flue gas-water dividing wall type heat exchanger and heating the flue gas, so that the water vapor content in the flue gas is in an unsaturated state, and the discharge port is used for discharging the heated flue gas to the outside.
Wherein, the dividing wall type heat exchanger is characterized in that cold and hot fluids are separated by a layer of solid wall surface (tube or plate) and are not mixed, and heat exchange is carried out through the dividing wall.
As shown in fig. 2, the flue gas-air heat mixer is communicated with a flue gas-water direct contact heat exchanger 3e through a hood 3 d; the flue gas-air heat mixer comprises a second air inlet and a second air outlet, wherein the second air inlet is used for transmitting external air to the flue gas-air heat mixer so that the flue gas in the flue gas-air heat mixer forms mixed gas, and the second air outlet is used for discharging the mixed gas outside.
Specifically, the hot water outlet of the steam-water heat exchanger 3c is divided into two paths, one path overflows outwards through a pipeline L11, the other path is connected with a water-water heat exchanger 4 described below through a pipeline L8 and returns to the steam-water heat exchanger 3c through a pipeline L10, the backwater inlet of the water-water heat exchanger 4 is connected with a hot user backwater pipeline L9, the water supply outlet connecting pipelines L16 and L16 of the water-water heat exchanger 4 are divided into two paths, one path is connected with the hot water inlet of the flue gas-water dividing wall type heat exchanger through a pipeline L19, the other path is converged with the hot water outlet pipeline L19 of the flue gas-water dividing wall type heat exchanger through a pipeline L18 and returns to a hot user, and the flue gas condensate water of the flue gas-water dividing wall type heat exchanger 3g overflows outwards through a pipeline L15.
As shown in fig. 2, the flue gas at the outlet of the boiler 1 is connected with the flue gas inlet of the flue gas-air heat exchanger 2 through a flue L1, the flue gas at the outlet of the flue gas-air heat exchanger 2 is connected with the flue gas inlet of the desulfurization spray tower 3a through a flue L2, the flue gas at the outlet of the desulfurization spray tower 3a is connected with the flue gas inlet of the steam-water heat exchanger 3c through a hood 3b, the flue gas at the outlet of the steam-water heat exchanger 3c is connected with the flue gas inlet of the flue gas-water direct contact heat exchanger 3e through a hood 3d, the flue gas at the outlet of the flue gas-water direct contact heat exchanger 3e is connected with the flue gas inlet of the flue gas-air heat mixer through a hood 3f, and finally the flue gas is discharged into the environment from the flue gas outlet of the flue gas-air heat mixer 3g through the flue L3 to form a flue gas passage.
Ambient air enters the air-water direct contact heat exchanger 3h through an air pipeline L4, air at the outlet of the air-water direct contact heat exchanger 3h enters the flue gas-air heat exchanger 2 through an air pipeline L5, and air at the outlet of the flue gas-air heat exchanger 2 enters the boiler 1 through a pipeline L6 to support combustion, so that an air passage is formed.
The slurry of the flue gas desulfurization spray tower 3a circularly sprays flue gas through a pipeline L7 to desulfurize the flue gas.
The hot water outlet of the steam-water heat exchanger 3c is divided into two paths, one path overflows outwards through a pipeline L11, the other path is connected with the water-water heat exchanger 4 through a pipeline L8 and returns to the steam-water heat exchanger 3c through a pipeline 10, the return water inlet of the water-water heat exchanger 4 is connected with a hot user return water pipeline L17, and the water supply outlet of the water-water heat exchanger 4 returns to a hot user through a pipeline L18.
The hot water of the flue gas-water direct contact heat exchanger 3e is divided into two paths, one path overflows outwards through a pipeline L14, the other path enters the air-water direct contact heat exchanger 3h through a pipeline L12, and cold water of the air-water direct contact heat exchanger 3h enters the flue gas-water direct contact heat exchanger 3e through a pipeline L13 to form an internal circulation waterway of the flue gas-air total heat exchange unit.
The air inlet of the flue gas-air heat mixer is connected with the outside to suck air, the flue gas from the flue gas-water direct contact heat exchanger 3e is mixed with the air, the temperature and humidity of the flue gas are reduced, and finally the mixed gas of the flue gas and the air is discharged into the delay condensed water of the environment flue gas-air heat mixer to overflow outwards through an overflow pipe L15.
Further, the steam-water heat exchanger 3c, the flue gas-water direct contact heat exchanger 3e and the air-water direct contact heat exchanger 3h are any one of a cross flow heat exchanger, a counter flow heat exchanger or a concurrent flow heat exchanger.
Further, in the above embodiments, the steam-water heat exchanger 3c may be a direct contact heat exchanger or an indirect contact heat exchanger, depending on the need of structural arrangement; when the steam-water heat exchanger 3c is a direct contact heat exchanger, the direct contact heat exchanger adopts a heat exchanger with a cavity structure or a heat exchanger with a filler structure; distributing liquid of the heat exchanger water with the cavity structure through a spraying mechanism; or, in the heat exchanger with the filler structure, water is distributed through a spraying mechanism or a tray spraying mechanism.
Further, the first inlet of the steam-water heat exchanger 3c and the second inlet of the flue gas-water direct contact heat exchanger 3e can be provided with spray water pipes, and the inlets of the spray water pipes can be provided with dosing ports so as to add denitration agents into the flow waterways of the steam-water heat exchanger and the flue gas-water direct contact heat exchanger through the dosing ports; and meanwhile, the effects of neutralizing the acidity of the solution and reducing the emission of NOx are achieved.
Further, the flue gas-air total heat exchange unit comprises an N-level flue gas-air total heat exchange unit, wherein N is more than or equal to 1; the flue gas outlet of the flue gas waste heat recovery unit is communicated with the first-stage flue gas-air total heat exchange unit, the flue gas outlet of each stage of flue gas-air total heat exchange unit is communicated with the flue gas inlet of the next-stage flue gas-air total heat exchange unit, and the flue gas outlet of the Nth-stage flue gas-air total heat exchange unit is communicated with the flue gas whitening unit to form a flue gas total heat exchange passage.
Further, the flue gas desulfurization unit adopts any one of a packed tower, an air-jet tower or a plate tower.
The embodiment provides a fire coal flue gas whitewashing, emission reduction and waste heat degree of depth recovery unit, includes: 3g of a flue gas desulfurization unit, a flue gas waste heat recovery unit, a flue gas-air total heat exchange unit and a flue gas whitening unit; compared with the existing coal-fired flue gas waste heat recovery device, the flue gas-air total heat exchange unit is arranged, so that the moisture content of combustion air is increased, the dew point temperature of the flue gas is increased, and the flue gas waste heat can be recovered by using cold source water with higher temperature; by arranging the flue gas waste heat recovery unit and the flue gas whitening unit, water vapor in the flue gas is condensed and recovered, and finally the moisture content of the discharged flue gas is reduced, so that the generation of white flue gas is reduced; the water vapor in the flue gas is condensed, the flue gas waste heat is deeply recovered, the flue gas is desulfurized, and meanwhile, the combustion air is humidified to effectively reduce the combustion temperature and reduce NOx and SO 2 Is discharged from the reactor; the temperature, the moisture content and the sulfide of the flue gas are obviously reduced, and the whitening effect is achieved; the technical problems that a large amount of waste heat of flue gas is wasted and a 'white smoke' phenomenon is generated in the prior art are solved; the natural cold source of outdoor air in winter is used as a main cooling and dehumidifying source, so that the functions of desulfurization, nitrogen reduction, waste heat recovery, white removal and the like are integrated, the functions are mechanically coupled with each other, the natural cold source and the natural cold source supplement each other, the system investment is low, and the economic benefit of energy conservation and emission reduction is good.
The system for removing white, reducing emission and deeply recovering waste heat of the coal-fired flue gas comprises a boiler 1, a flue gas-air heat exchanger 2, a water-water heat exchanger 4 and the device 4 for removing white, reducing emission and deeply recovering waste heat of the coal-fired flue gas; the boiler 1 is communicated with a flue gas desulfurization unit through a flue gas-air heat exchanger 2; the flue gas-air heat exchanger 2 comprises a third air inlet and a third air outlet, wherein the third air inlet is communicated with the first air outlet of the flue gas-air total heat exchange unit and is used for reheating the air heated by the flue gas-air total heat exchange unit and the flue gas of the flue gas-air heat exchanger 2, and the third air outlet is communicated with the boiler 1 and is used for adding the air heated secondarily into the boiler 1 for supporting combustion; the water-water heat exchanger 4 comprises a backwater inlet, a water supply inlet, a first water supply outlet and a second water supply outlet; the water return inlet is communicated with a water return pipeline of a heat user, the water supply inlet is communicated with a hot water outlet of the steam-water heat exchanger 3c, and the first water supply outlet is communicated with a hot water inlet of the steam-water heat exchanger 3c, so that low-temperature water in the water-water heat exchanger 4 passes through flue gas heat exchange in the steam-water heat exchanger 3c and then outputs hot water with high temperature; the second water supply outlet is communicated with a water supply pipeline of a heat user, and a heating pipeline and a water return pipeline are arranged on the water supply pipeline and can be communicated with the smoke whitening unit 3g so as to heat smoke of the smoke whitening unit 3g through hot water in the water supply pipeline, so that the water vapor content in the smoke is in an unsaturated state.
Specifically, the flue gas at the outlet of the boiler 1 is connected with the flue gas inlet of the flue gas-air heat exchanger 2 through a flue L1, the flue gas at the outlet of the flue gas-air heat exchanger 2 is connected with the flue gas inlet of the desulfurization spray tower 3a through a flue L2, the flue gas at the outlet of the desulfurization spray tower 3a is connected with the flue gas inlet of the steam-water heat exchanger 3c through a hood 3b, the flue gas at the outlet of the steam-water heat exchanger 3c is connected with the flue gas inlet of the flue gas-water direct contact heat exchanger 3e through a hood 3d, the flue gas at the outlet of the flue gas-water direct contact heat exchanger 3e is connected with the flue gas inlet of the flue gas-water dividing wall heat exchanger through a hood 3f, and finally the flue gas is discharged into the environment from the outlet of the flue gas-water dividing wall heat exchanger through the flue L3 to form a flue gas passage;
further, a plurality of monitoring instruments S1-S14 are arranged on the connecting pipelines between the boiler 1 and the flue gas-air heat exchanger 2, between the flue gas-air heat exchanger 2 and the fire coal flue gas whitening, emission reduction and waste heat deep recovery device 3 and between the fire coal flue gas whitening, emission reduction and waste heat deep recovery device 3 and the water-water heat exchanger 4; the monitoring instruments S1-S14 are used for monitoring various information of the temperature, humidity, flow rate and concentration of smoke dust particles, oxynitride and sulfur dioxide of water, air and flue gas arranged on the connecting pipelines L1-L20 through a multi-parameter control and adjustment method.
Specifically, by adopting a multi-parameter control and adjustment method, a plurality of monitoring instruments S1-S14 such as the temperature, the humidity and the flow rate of water, air and smoke, the concentration of smoke particles, nitrogen oxides and sulfur dioxide and the like are arranged at key nodes of each component part, and the thermal parameters of water, air and smoke and the emission parameters of smoke pollutants are controlled by utilizing a plurality of monitoring indexes, so that the system is controlled to run throughout the year and under variable working conditions.
In this embodiment, the monitoring instruments S1 to S14 may be a temperature and pressure instrument, a flow instrument, an instrument for monitoring smoke particulate matters, nitrogen oxides and sulfur dioxide concentrations, etc., and perform multi-directional information monitoring through a plurality of instruments.
As shown in fig. 1, the following details the operation process of the fire coal flue gas whitening, emission reduction and waste heat deep recovery system provided in this embodiment:
(1) For flue gas: the flue gas generated by the boiler 1 sequentially enters a flue gas-air heat exchanger 2, a steam-water heat exchanger 4, a flue gas desulfurization spray tower 3a, a steam-water heat exchanger 3c and a flue gas-water direct contact heat exchanger 3e, the flue gas is cooled and dehumidified, and finally the flue gas is discharged into the environment through a flue gas-water dividing wall type heat exchanger, the flue gas is heated by sensible heat in the flue gas-water dividing wall type heat exchanger to be far away from a saturation line, the relative humidity is reduced, and the generation of white smoke can be reduced when the flue gas is discharged into the environment;
(2) For air: ambient air sequentially enters an air-water direct contact heat exchanger 3h and a flue gas-air heat exchanger 2, and then enters a boiler 1 for combustion supporting after being heated and humidified, and the air is heated and humidified, namely the equivalent heat capacity of the air is improved, so that the moisture content of flue gas generated by the combustion of the boiler 1 is increased, the dew point of the flue gas is increased, and further, the flue gas waste heat can be recovered by using cold source water with higher temperature;
(3) For spray water: the slurry of the desulfurization spray tower 3a circularly sprays flue gas through a pipeline L7 to desulfurize the flue gas; the sprayed hot water in the steam-water heat exchanger 3b is divided into two paths, one path is discharged to the outside through an overflow pipe, the other path exchanges heat with the backwater of a hot user through the water-water heat exchanger 4, and the recovered flue gas waste heat is transmitted to the backwater of the hot user and then returns to the steam-water heat exchanger 3b to be in direct contact with the flue gas for heat exchange, so that spray water circulation is formed; in the flue gas-air total heat exchange unit, the sprayed hot water in the flue gas-water direct contact heat exchanger 3e is divided into two paths, one path is discharged to the outside through an overflow pipe, the other path enters the air-water direct contact heat exchanger 3h to be in direct contact with air for heat exchange, and the cooled water returns to the flue gas-water direct contact heat exchanger 3e to be in direct contact with the flue gas for heat exchange, so that the internal water circulation of the flue gas-air total heat exchange unit is formed, and the sprayed water in the internal water circulation is a medium for enabling the flue gas and the air to be in total heat exchange;
(4) For hot user backwater: the return water of the heat user exchanges heat with the spray hot water in the steam-water heat exchanger 3b through the water-water heat exchanger 2, the return water of the heat user at the outlet of the water-water heat exchanger 2 is divided into two paths, one path enters the flue gas-water dividing wall type heat exchanger through a pipeline L17 to heat the flue gas, so that the flue gas is far away from a saturation line, the relative humidity is reduced, the generation of white smoke is reduced, and the other path is converged with a hot water outlet pipeline L19 of the flue gas-water dividing wall type heat exchanger through a pipeline L18 to return to the heat user through a pipeline L20.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (7)
1. The utility model provides a fire coal flue gas whiteout, emission reduction and waste heat degree of depth recovery unit, its characterized in that includes: the flue gas desulfurization unit, the flue gas waste heat recovery unit, the flue gas-air total heat exchange unit and the flue gas whitening unit;
the flue gas desulfurization unit, the flue gas waste heat recovery unit, the flue gas-air total heat exchange unit and the flue gas whitening unit are sequentially communicated to form a flue gas passage;
the flue gas desulfurization unit is used for desulfurizing the flue gas discharged by the boiler and then transmitting the flue gas to the flue gas waste heat recovery unit;
the flue gas waste heat recovery unit comprises a steam-water heat exchanger, wherein the steam-water heat exchanger is used for transferring heat in flue gas to hot water, and the hot water subjected to heat exchange is transferred to a hot water inlet of a boiler or a water supply pipeline of a heat user through a hot water outlet of the steam-water heat exchanger; the flue gas waste heat recovery unit is used for transferring the flue gas subjected to heat exchange to the flue gas-air total heat exchange unit;
the flue gas-air total heat exchange unit is provided with a first air inlet and a first air outlet, the first air inlet is communicated with the outside air, the flue gas-air total heat exchange unit is used for transmitting heat and moisture in the flue gas to the air, and the first air outlet is communicated with the boiler and is used for supporting combustion in the boiler; the flue gas-air total heat exchange unit is used for transferring the flue gas subjected to heat exchange to the flue gas whitening unit;
the smoke whitening unit is used for enabling the water vapor content in the smoke to be in an unsaturated state, or is used for enabling the smoke to be mixed with the outside air and discharging the treated smoke to the outside;
the flue gas-air total heat exchange unit comprises a flue gas-water direct contact type heat exchanger and an air-water direct contact type heat exchanger;
the flue gas whitening unit comprises a flue gas-water dividing wall type heat exchanger or a flue gas-air heat mixer;
the flue gas-water dividing wall type heat exchanger is communicated with the flue gas-water direct contact type heat exchanger through a hood;
the flue gas-water dividing wall type heat exchanger comprises a fourth inlet, a sixth outlet, a seventh outlet and a discharge outlet; the sixth outlet is used for overflowing and discharging water in the flue gas-water dividing wall type heat exchanger, the fourth inlet and the seventh outlet form a circulating waterway with a water supply pipeline of a boiler or a heat user, the circulating waterway is used for transmitting hot water of the water supply pipeline of the boiler or the heat user into the flue gas-water dividing wall type heat exchanger and heating flue gas so that the water vapor content in the flue gas is in an unsaturated state, and the discharge outlet is used for discharging the heated flue gas to the outside;
or the flue gas-air heat mixer is communicated with the flue gas-water direct contact heat exchanger through a hood;
the flue gas-air heat mixer comprises a second air inlet and a second air outlet, wherein the second air inlet is used for transmitting external air to the flue gas-air heat mixer so that the flue gas in the flue gas-air heat mixer forms mixed gas, and the second air outlet is used for discharging the mixed gas outside;
the steam-water heat exchanger, the flue gas-water direct contact heat exchanger and the air-water direct contact heat exchanger are any one of a cross-flow heat exchanger, a countercurrent heat exchanger or a concurrent heat exchanger;
the steam-water heat exchanger is a direct contact heat exchanger or an indirect contact heat exchanger;
when the steam-water heat exchanger is a direct contact heat exchanger, the direct contact heat exchanger adopts a heat exchanger with a cavity structure or a heat exchanger with a filler structure;
the heat exchanger water with the cavity structure is distributed by a spraying mechanism;
or, in the heat exchanger with the filler structure, water is distributed through a spraying mechanism or a tray spraying mechanism.
2. The fire coal flue gas whitening, emission reduction and waste heat deep recovery device according to claim 1, wherein the flue gas desulfurization unit comprises a desulfurization spray tower, a pipeline and a water pump;
the bottom in the desulfurization spray tower is provided with a slurry pool, the slurry pool stores spray slurry containing desulfurization agents, the top of the desulfurization spray tower is provided with a spray header, the slurry pool is communicated with the spray header through a pipeline, and a water pump is arranged on the pipeline so as to circularly communicate the slurry in the slurry pool with the spray header through the water pump, so that the spray slurry containing desulfurization agents circularly sprays the flue gas in the flue gas desulfurization unit;
the steam-water heat exchanger is communicated with the desulfurization spray tower through a hood;
the steam-water heat exchanger comprises a first inlet, a first outlet and a second outlet; the first outlet is used for overflowing and discharging water in the steam-water heat exchanger through a pipeline, and the first inlet and the second outlet form a circulating pipeline with hot water of a boiler or a water supply pipeline of a heat user through pipelines.
3. The fire coal flue gas whitening, emission reduction and waste heat deep recovery device according to claim 2, wherein the flue gas-water direct contact heat exchanger is communicated with the steam-water heat exchanger through a hood;
the flue gas-water direct contact heat exchanger comprises a second inlet, a third outlet and a fourth outlet; the air-water direct contact heat exchanger comprises a first air inlet, a first air outlet, a third inlet and a fifth outlet; the third outlet is used for overflowing and discharging water in the flue gas-water direct contact heat exchanger, the fourth outlet is communicated with the third inlet and used for transmitting hot water of the flue gas-water direct contact heat exchanger into the air-water direct contact heat exchanger, the first air inlet is used for exchanging heat with the hot water by transmitting outside air into the air-water direct contact heat exchanger, and the first air outlet is communicated with a boiler and used for supporting combustion in the boiler; the fifth outlet is communicated with the second inlet and is used for transmitting the cooled water into the flue gas-water direct contact heat exchanger to form an internal circulating waterway.
4. The fire coal flue gas whitening, emission reduction and waste heat deep recovery device according to claim 3, wherein a spray water pipe is arranged at a first inlet of the steam-water heat exchanger and a second inlet of the flue gas-water direct contact heat exchanger, and a dosing port is arranged at an inlet of the spray water pipe so as to add a denitration agent into the flow waterways of the steam-water heat exchanger and the flue gas-water direct contact heat exchanger through the dosing port.
5. The fire coal flue gas whitening, emission reduction and waste heat deep recovery device according to any one of claims 1 to 4, wherein the flue gas-air total heat exchange unit comprises an N-stage flue gas-air total heat exchange unit, wherein N is more than or equal to 1;
the flue gas outlet of the flue gas waste heat recovery unit is communicated with the first stage flue gas-air total heat exchange unit, the flue gas outlet of each stage of flue gas-air total heat exchange unit is communicated with the flue gas inlet of the next stage of flue gas-air total heat exchange unit, and the flue gas outlet of the Nth stage of flue gas-air total heat exchange unit is communicated with the flue gas whitening unit to form a flue gas total heat exchange passage.
6. A fire coal flue gas whitening, emission reduction and waste heat deep recovery system, which is characterized by comprising a boiler, a flue gas-air heat exchanger, a water-water heat exchanger and the fire coal flue gas whitening, emission reduction and waste heat deep recovery device according to any one of claims 1-5;
the boiler is communicated with the flue gas desulfurization unit through the flue gas-air heat exchanger;
the flue gas-air heat exchanger comprises a third air inlet and a third air outlet, the third air inlet is communicated with the first air outlet of the flue gas-air total heat exchange unit and is used for reheating air heated by the flue gas-air total heat exchange unit and flue gas of the flue gas-air heat exchanger, and the third air outlet is communicated with the boiler and is used for adding the secondarily heated air into the boiler for supporting combustion;
the water-water heat exchanger comprises a backwater inlet, a water supply inlet, a first water supply outlet and a second water supply outlet; the water return inlet is communicated with a water return pipeline of a heat user, the water supply inlet is communicated with a hot water outlet of the steam-water heat exchanger, and the first water supply outlet is communicated with a hot water inlet of the steam-water heat exchanger so that low-temperature water in the water-water heat exchanger can output hot water with high temperature after passing through flue gas heat exchange in the steam-water heat exchanger; the second water supply outlet is communicated with a water supply pipeline of a heat user, a heating pipeline and a water return pipeline are arranged on the water supply pipeline, the heating pipeline and the water return pipeline can be communicated with the smoke whitening unit, so that the smoke of the smoke whitening unit is heated by hot water in the water supply pipeline, and the water vapor content in the smoke is in an unsaturated state.
7. The fire coal flue gas whitening, emission reduction and waste heat deep recovery system according to claim 6, wherein a plurality of monitoring instruments are arranged on connecting pipelines between the boiler and the flue gas-air heat exchanger, between the flue gas-air heat exchanger and the fire coal flue gas whitening, emission reduction and waste heat deep recovery device and between the fire coal flue gas whitening, emission reduction and waste heat deep recovery device and the water-water heat exchanger; the monitoring instrument is used for monitoring the temperature, the humidity and the flow rate of water, air and flue gas which are arranged on a plurality of connecting pipelines and various information of the concentration of smoke dust particles, oxynitride and sulfur dioxide through a multi-parameter control and adjustment method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810669287.5A CN108775595B (en) | 2018-06-26 | 2018-06-26 | Fire coal flue gas whitening, emission reduction and waste heat deep recovery device and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810669287.5A CN108775595B (en) | 2018-06-26 | 2018-06-26 | Fire coal flue gas whitening, emission reduction and waste heat deep recovery device and system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108775595A CN108775595A (en) | 2018-11-09 |
| CN108775595B true CN108775595B (en) | 2023-08-22 |
Family
ID=64025600
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810669287.5A Active CN108775595B (en) | 2018-06-26 | 2018-06-26 | Fire coal flue gas whitening, emission reduction and waste heat deep recovery device and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108775595B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109821330B (en) * | 2019-03-20 | 2024-06-14 | 云能科技有限公司 | Flue gas treatment device and energy system |
| CN109939555A (en) * | 2019-04-26 | 2019-06-28 | 云能科技有限公司 | Efficiency controls haze integrated apparatus and flue gas purifying technique |
| CN110578929B (en) * | 2019-08-29 | 2024-06-25 | 清华大学山西清洁能源研究院 | Waste heat recovery boiler integrated device |
| CN117113609B (en) * | 2023-10-23 | 2024-01-05 | 国网浙江省电力有限公司湖州供电公司 | Optimization and improvement method of power transformer waste heat recovery system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101450660B1 (en) * | 2014-07-10 | 2014-10-15 | 지이큐솔루션 주식회사 | Reduction of white smoke abatement systems and methods |
| CN107433118A (en) * | 2017-07-21 | 2017-12-05 | 上海交通大学 | A kind of system and method for desulfurization fume eliminating white smoke |
| CN206810050U (en) * | 2017-02-24 | 2017-12-29 | 天津华赛尔传热设备有限公司 | A kind of flue gas of wet desulphurization disappears white system |
| CN107676805A (en) * | 2017-09-22 | 2018-02-09 | 华电电力科学研究院 | A kind of efficiently water intaking eliminating white smoke cooperation-removal pollutant device and its method of work |
| CN108194939A (en) * | 2018-01-24 | 2018-06-22 | 中国华电科工集团有限公司 | It is a kind of to be used for the exhaust heat stepped device and method using with eliminating white smoke of thermal power plant |
-
2018
- 2018-06-26 CN CN201810669287.5A patent/CN108775595B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101450660B1 (en) * | 2014-07-10 | 2014-10-15 | 지이큐솔루션 주식회사 | Reduction of white smoke abatement systems and methods |
| CN206810050U (en) * | 2017-02-24 | 2017-12-29 | 天津华赛尔传热设备有限公司 | A kind of flue gas of wet desulphurization disappears white system |
| CN107433118A (en) * | 2017-07-21 | 2017-12-05 | 上海交通大学 | A kind of system and method for desulfurization fume eliminating white smoke |
| CN107676805A (en) * | 2017-09-22 | 2018-02-09 | 华电电力科学研究院 | A kind of efficiently water intaking eliminating white smoke cooperation-removal pollutant device and its method of work |
| CN108194939A (en) * | 2018-01-24 | 2018-06-22 | 中国华电科工集团有限公司 | It is a kind of to be used for the exhaust heat stepped device and method using with eliminating white smoke of thermal power plant |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108775595A (en) | 2018-11-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108775595B (en) | Fire coal flue gas whitening, emission reduction and waste heat deep recovery device and system | |
| CN105879596B (en) | A kind of absorption desulfurization fume dehumidification system and method | |
| CN101063527B (en) | Process for controlling the moisture concentration of a combustion flue gas | |
| CN206121503U (en) | Liquid cooling of wet desulphurization tower entoplasm is high -efficient flue gas processing system but | |
| CN110425902A (en) | Flue gas waste heat recycling system and method after wet desulphurization | |
| CN106563337A (en) | Multi-channel circulating absorption-type flue gas waste-heat utilization, purification and dehumidification device and method thereof | |
| TWM558661U (en) | Smoke gas white-elimination system for wet desulphurization | |
| CN108479289A (en) | A kind of white-smoke-removing system and technique accurately controlling corrosion | |
| CN106861354A (en) | A kind of condensation method water saving wet desulfurizer | |
| CN210612932U (en) | White smoke eliminating device for smoke spraying, heat exchange, condensation and waste heat recovery | |
| CN208406509U (en) | A kind of white-smoke-removing system of accurate control corrosion rate | |
| CN109114840B (en) | Absorption heat pump treatment equipment | |
| CN209237697U (en) | A kind of zero water consume coal-fired flue-gas wet desulphurization device | |
| CN208229598U (en) | A kind of wet desulphurization takes off white and residual neat recovering system with flue gas | |
| CN208742284U (en) | A kind of single column washing Wet fume sweetening dust remover of no stock tank secondary cycle | |
| CN109925839A (en) | It is a kind of to utilize fume afterheat deep condensation demister system | |
| CN109395539A (en) | It is a kind of to spray the white device that disappears | |
| CN205127717U (en) | Supporting sea water desulfurization system of coal -fired power unit | |
| CN207042170U (en) | Condensation method water saving wet desulfurizer | |
| CN208887158U (en) | A kind of absorption heat pump processing equipment | |
| CN203671628U (en) | Spraying absorption type gas and smoke total heat recovery, desulfurization and denitrification device | |
| CN209451538U (en) | Single-tower three-region desulfurization and whitening integrated device | |
| CN209060881U (en) | A kind of demisting for wet desulfurizing process disappears white system | |
| CN204147740U (en) | The ultra-clean exhaust system of a kind of coal steam-electric plant smoke ultralow temperature | |
| CN207445927U (en) | A kind of Wet FGD |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230927 Address after: 041099 Middle section of Hefen Road, Linfen Economic and Technological Development Zone, Fenxi County, Linfen City, Shanxi Province Patentee after: SHANXI SANSHINE ENERGY CO.,LTD. Address before: Room 102, Office Building of Shuaifu Company, No. 52, south of Yining Street, west of Huiyuan Road, Yining Park, Khorgos Economic Development Zone, Yili Kazak Autonomous Prefecture, Xinjiang Uygur Autonomous Region, 835000 Patentee before: CLOUD ENERGY CONSERVATION Co.,Ltd. |