CN117398825A - Flue gas purification system and method for thermal power plant - Google Patents

Flue gas purification system and method for thermal power plant Download PDF

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Publication number
CN117398825A
CN117398825A CN202311476863.1A CN202311476863A CN117398825A CN 117398825 A CN117398825 A CN 117398825A CN 202311476863 A CN202311476863 A CN 202311476863A CN 117398825 A CN117398825 A CN 117398825A
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China
Prior art keywords
flue gas
box
adsorption
power plant
thermal power
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CN202311476863.1A
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Chinese (zh)
Inventor
刘敏
郑宝俊
甄长红
韦佳吟
郑文
彭华
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Huaneng Lanzhou Fanping Thermal Power Co ltd
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Huaneng Lanzhou Fanping Thermal Power Co ltd
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Priority to CN202311476863.1A priority Critical patent/CN117398825A/en
Publication of CN117398825A publication Critical patent/CN117398825A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/75—Multi-step processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
    • B01D46/12—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces in multiple arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/007—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by irradiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
    • B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/38—Removing components of undefined structure
    • B01D53/40—Acidic components
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/60—Simultaneously removing sulfur oxides and nitrogen oxides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/76—Gas phase processes, e.g. by using aerosols
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/77—Liquid phase processes
    • B01D53/78—Liquid phase processes with gas-liquid contact
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/81—Solid phase processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2258/00—Sources of waste gases
    • B01D2258/02—Other waste gases
    • B01D2258/0283—Flue gases

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Toxicology (AREA)
  • Dispersion Chemistry (AREA)
  • Treating Waste Gases (AREA)

Abstract

The invention discloses a flue gas purification system and a flue gas purification method of a thermal power plant, wherein the flue gas purification system comprises a flue gas treatment box, a flue gas atomization box, a flue gas primary purification box, a flue gas adsorption box and a flue gas secondary purification box, wherein a flue gas inlet pipe is arranged at the gas inlet end of the flue gas treatment box, the gas outlet end of the flue gas treatment box is connected with the gas inlet end of the flue gas atomization box through a first pipeline, the gas outlet end of the flue gas atomization box is connected with the gas inlet end of the flue gas primary purification box through a second pipeline, the gas outlet end of the flue gas primary purification box is connected with the gas inlet end of the flue gas adsorption box through a third pipeline, and the gas outlet end of the flue gas secondary purification box is provided with a gas exhaust pipeline.

Description

Flue gas purification system and method for thermal power plant
Technical Field
The invention relates to the technical field of flue gas purification, in particular to a flue gas purification system and method of a thermal power plant.
Background
A thermal power plant is a thermal power plant for short, and is a plant for producing electric energy by using combustible materials (such as coal) as fuel. The basic production process is as follows: the fuel heats water to generate steam when being combusted, chemical energy of the fuel is converted into heat energy, steam pressure pushes the steam turbine to rotate, the heat energy is converted into mechanical energy, and then the steam turbine drives the generator to rotate, so that the mechanical energy is converted into electric energy. Modern thermal power plants are composed of a large variety of mechanical devices and electrical equipment. In order to produce electric energy and heat energy, the devices and equipment must act in coordination to achieve the aim of safe and economical production. This work is the operation of the thermal power plant. In order to ensure safe and economical operation of primary equipment such as furnaces, machines, electricity, etc., and auxiliary equipment for each system, a series of operating procedures and regulations are strictly performed. The operation of a thermal power plant mainly includes 3 aspects, namely start-up and shut-down operation, economical operation, faults and countermeasures. The basic requirements for the operation of a thermal power plant are to ensure safety, economy and the quality of electric energy.
The thermal power plant produces a large amount of flue gas in the electricity generation process, if not in time purification treatment, and the flue gas of emission causes the pollution to the environment, and current clean system generally adsorbs the purification through a plurality of adsorption nets, and purifying effect is poor, consequently, need improve.
Disclosure of Invention
The invention aims to provide a flue gas purification system and method for a thermal power plant, which are used for solving the problems in the background technology.
In order to achieve the above purpose, the present invention provides the following technical solutions: the flue gas purification system of the thermal power plant comprises a flue gas treatment box, a flue gas atomization box, a flue gas primary purification box, a flue gas adsorption box and a flue gas secondary purification box;
the gas inlet pipe is installed to the inlet end of flue gas treatment case, the end of giving vent to anger of flue gas treatment case passes through first pipe connection with the inlet end of flue gas atomizing case, the end of giving vent to anger of flue gas atomizing case and the gas inlet end of flue gas primary purification case are connected through the second pipeline, the end of giving vent to anger of flue gas primary purification case passes through the third pipe connection with the inlet end of flue gas adsorption case, the end of giving vent to anger of flue gas adsorption case is connected through the fourth pipeline between the inlet end of flue gas secondary purification case, the end of giving vent to anger of flue gas secondary purification case installs exhaust duct.
Preferably, the application provides a flue gas cleaning system of thermal power plant, wherein, flue gas treatment case inner chamber installation granule filter screen subassembly, granule filter screen subassembly includes net frame, elementary particle filter screen and high-efficient particle filter screen, elementary particle filter screen and high-efficient particle filter screen are installed in the net frame in proper order, frame movable mounting is in flue gas treatment incasement.
Preferably, the application provides a flue gas cleaning system of thermal power plant, wherein, flue gas atomizing box inner chamber installation atomizing subassembly, atomizing subassembly includes shower, atomizer and atomizing box, the shower is installed in flue gas atomizing box inner roof, the equidistant installation of atomizer is on the shower, the atomizing box is installed in flue gas atomizing box outer top, just the shower communicates with the atomizing box, install the high-pressure pump body in the atomizing box.
Preferably, the application provides a flue gas cleaning system of thermal power plant, wherein, splendid attire alkaline solution in the atomizing case, alkaline solution is mixed by sodium carbonate solution, sodium bicarbonate solution and water and forms.
Preferably, the application provides a flue gas purification system of thermal power plant, wherein, the flue gas once purifying box installs once adsorption component, once adsorption component includes first adsorption net, first adsorption coating and second adsorption coating are coated in first adsorption net both sides respectively, first adsorption coating and second adsorption coating component include fly ash 30-40 parts, metakaolin 20-30 parts, coconut husk powder 5-10 parts, peat 6-12 parts, VAE emulsion 20-30 parts, borate coupling agent 30-50 parts, polypropylene microballon 10-20 parts, shell powder 5-12 parts by weight.
Preferably, the application provides a flue gas cleaning system of thermal power plant, wherein, flue gas adsorption box installs many first adsorption carbon rods and many second adsorption carbon rods, and many first adsorption carbon rods perpendicular to flue gas adsorption box inner top wall, many second adsorption carbon rods perpendicular to flue gas adsorption box inner bottom wall, just first adsorption carbon rods and second adsorption carbon rods are crisscross to be set up.
Preferably, the application provides a flue gas purification system of thermal power plant, wherein, flue gas secondary purification incasement installation secondary adsorption component, secondary adsorption component includes first individual layer ceramic porous filter, second individual layer ceramic porous filter, first microwave generator, second microwave generator, ozone generator sets up between first microwave generator and second microwave generator, first individual layer ceramic porous filter sets up in second microwave generator one side, second individual layer ceramic porous filter sets up in first microwave generator one side.
Preferably, the application provides a flue gas purification system of a thermal power plant, wherein, the purification method comprises the following steps:
A. the flue gas of the thermal power plant enters a flue gas treatment box through a flue gas inlet pipe;
B. the flue gas is subjected to multistage filtration through a particle filter screen assembly, so that large particle impurities in the flue gas are removed;
C. then the flue gas enters a flue gas atomization box, alkaline solution in the flue gas atomization box is sprayed out from an atomization nozzle to be uniformly mixed with the flue gas for reaction, and acidic substances in the flue gas are removed;
D. then the flue gas enters a primary flue gas purifying box and is subjected to desulfurization and denitrification treatment through the adsorption of the first adsorption coating and the second adsorption coating;
E. then the flue gas enters a flue gas adsorption box, and peculiar smell removal treatment is carried out on the flue gas through carbon rods which are arranged in a staggered manner;
F. finally, the flue gas enters a secondary flue gas purifying box to further decompose and treat harmful substances in the flue gas and then is discharged.
Compared with the prior art, the invention has the beneficial effects that:
(1) The invention has simple structure, can carry out desulfurization and denitrification as well as adsorption and purification treatment on the flue gas of the thermal power plant, has low treatment cost and can ensure the environmental protection of the flue gas emission.
(2) According to the invention, the particle filter screen assembly arranged in the inner cavity of the flue gas treatment box can carry out multistage filtration on particles in the flue gas, so that the subsequent purifying treatment effect of the flue gas is improved.
(3) According to the invention, the atomization assembly arranged in the inner cavity of the smoke atomization box can uniformly atomize smoke to remove acidic substances in the smoke.
(4) In the invention, the flue gas primary purifying box can carry out desulfurization and denitrification treatment on the flue gas; the adopted secondary flue gas purifying box can thoroughly decompose harmful substances in the flue gas.
(5) According to the invention, the carbon rods which are arranged in a staggered manner are arranged in the flue gas adsorption box, so that peculiar smell removal and harmful substance adsorption treatment can be performed on flue gas.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic view of a particle filter screen assembly according to the present invention;
FIG. 3 is a schematic diagram of the adsorption assembly in the primary flue gas purifying box;
FIG. 4 is a schematic diagram of the adsorption assembly in the secondary flue gas purifying box;
FIG. 5 is a purification flow chart of the present invention;
in the figure: the flue gas treatment box 1, the flue gas atomizing box 2, the flue gas primary purification box 3, the flue gas adsorption box 4, the flue gas secondary purification box 5, the flue gas inlet pipe 6, the first pipeline 7, the second pipeline 8, the third pipeline 9, the fourth pipeline 10, the exhaust pipeline 11, the particle filter screen assembly 12, the net frame 13, the primary particle filter screen 14, the medium-efficiency particle filter screen 15, the high-efficiency particle filter screen 16, the spray pipe 17, the atomizing nozzle 18, the atomizing box 19, the high-pressure pump 20, the primary adsorption assembly 21, the first adsorption net 22, the first adsorption coating 23, the second adsorption coating 24, the first adsorption carbon rod 25, the first single-layer ceramic porous filter plate 26, the second single-layer ceramic porous filter plate 27, the first microwave generator 28, the second microwave generator 29, the ozone generator 30, the second adsorption carbon rod 31 and the secondary adsorption assembly 32.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. 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.
Referring to fig. 1-5, the present invention provides a technical solution: the flue gas purification system of the thermal power plant comprises a flue gas treatment box 1, a flue gas atomization box 2, a flue gas primary purification box 3, a flue gas adsorption box 4 and a flue gas secondary purification box 5;
the gas inlet pipe 6 is installed to the inlet end of flue gas treatment case 1, the end of giving vent to anger of flue gas treatment case 1 is connected through first pipeline 7 with the inlet end of flue gas atomizing case 2, be connected through second pipeline 8 between the end of giving vent to anger of flue gas atomizing case 2 and the gas inlet end of flue gas primary purification case 3, the end of giving vent to anger of flue gas primary purification case 3 is connected through third pipeline 9 with the inlet end of flue gas adsorption case 4, be connected through fourth pipeline 10 between the end of giving vent to anger of flue gas adsorption case 4 and the inlet end of flue gas secondary purification case 5, the exhaust duct 11 is installed to the end of giving vent to anger of flue gas secondary purification case 5.
In the invention, a particle filter screen assembly 12 is arranged in the inner cavity of a flue gas treatment box 1, the particle filter screen assembly 12 comprises a frame 13, a primary particle filter screen 14, a middle-effect particle filter screen 15 and a high-efficiency particle filter screen 16, the primary particle filter screen, the middle-effect particle filter screen 15 and the high-efficiency particle filter screen 16 are sequentially arranged in the frame 13, and the frame 13 is movably arranged in the flue gas treatment box 1. According to the invention, the particle filter screen assembly arranged in the inner cavity of the flue gas treatment box can carry out multistage filtration on particles in the flue gas, so that the subsequent purifying treatment effect of the flue gas is improved.
According to the invention, an atomization assembly is arranged in the inner cavity of a flue gas atomization box 2, the atomization assembly comprises a spray pipe 17, an atomization spray head 18 and an atomization box 19, the spray pipe 17 is arranged on the inner top wall of the flue gas atomization box 2, the atomization spray heads 18 are arranged on the spray pipe 17 at equal intervals, the atomization box 19 is arranged on the outer top of the flue gas atomization box 19, the spray pipe 17 is communicated with the atomization box 19, and a high-pressure pump body 20 is arranged in the atomization box 19; the atomizing tank 19 contains an alkaline solution formed by mixing a sodium carbonate solution, a sodium bicarbonate solution and water. According to the invention, the atomization assembly arranged in the inner cavity of the smoke atomization box can uniformly atomize smoke to remove acidic substances in the smoke.
In the invention, a primary adsorption component 21 is arranged in a primary flue gas purifying box 3, the primary adsorption component 21 comprises a first adsorption net 22, a first adsorption coating 23 and a second adsorption coating 24, the first adsorption coating 23 and the second adsorption coating 24 are respectively coated on two sides of the first adsorption net 22, and the components of the first adsorption coating 23 and the second adsorption coating 24 comprise 30-40 parts of fly ash, 20-30 parts of metakaolin, 5-10 parts of coconut shell powder, 6-12 parts of peat, 20-30 parts of VAE emulsion, 30-50 parts of borate coupling agent, 10-20 parts of polypropylene microspheres and 5-12 parts of shell powder in parts by weight;
in the invention, a secondary adsorption component 32 is arranged in a flue gas secondary purifying box, the secondary adsorption component 32 comprises a first single-layer ceramic porous filter plate 26, a second single-layer ceramic porous filter plate 27, a first microwave generator 28, a second microwave generator 29 and an ozone generator 30, the ozone generator 30 is arranged between the first microwave generator 28 and the second microwave generator 29, the first single-layer ceramic porous filter plate 26 is arranged on one side of the second microwave generator 29, and the second single-layer ceramic porous filter plate 27 is arranged on one side of the first microwave generator 28. In the invention, the flue gas primary purifying box can carry out desulfurization and denitrification treatment on the flue gas; the adopted secondary flue gas purifying box can thoroughly decompose harmful substances in the flue gas.
In the invention, a plurality of first adsorption carbon rods 25 and a plurality of second adsorption carbon rods 31 are arranged in a flue gas adsorption box 5, the plurality of first adsorption carbon rods 25 are perpendicular to the inner top wall of the flue gas adsorption box 5, the plurality of second adsorption carbon rods 31 are perpendicular to the inner bottom wall of the flue gas adsorption box 5, and the first adsorption carbon rods 25 and the second adsorption carbon rods 31 are staggered. According to the invention, the carbon rods which are arranged in a staggered manner are arranged in the flue gas adsorption box, so that peculiar smell removal and harmful substance adsorption treatment can be performed on flue gas.
Working principle: the purification method of the invention comprises the following steps:
A. the flue gas of the thermal power plant enters a flue gas treatment box through a flue gas inlet pipe;
B. the flue gas is subjected to multistage filtration through a particle filter screen assembly, so that large particle impurities in the flue gas are removed;
C. then the flue gas enters a flue gas atomization box, alkaline solution in the flue gas atomization box is sprayed out from an atomization nozzle to be uniformly mixed with the flue gas for reaction, and acidic substances in the flue gas are removed;
D. then the flue gas enters a primary flue gas purifying box and is subjected to desulfurization and denitrification treatment through the adsorption of the first adsorption coating and the second adsorption coating;
E. then the flue gas enters a flue gas adsorption box, and peculiar smell removal treatment is carried out on the flue gas through carbon rods which are arranged in a staggered manner;
F. finally, the flue gas enters a secondary flue gas purifying box to further decompose and treat harmful substances in the flue gas and then is discharged.
In conclusion, the flue gas desulfurization and denitration device is simple in structure, can carry out desulfurization and denitration, adsorption and purification treatment on flue gas of a thermal power plant, is low in treatment cost, and can ensure the environmental protection of flue gas emission.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (8)

1. A flue gas purification system of a thermal power plant is characterized in that: the flue gas purification system comprises a flue gas treatment box (1), a flue gas atomization box (2), a flue gas primary purification box (3), a flue gas adsorption box (4) and a flue gas secondary purification box (5);
the utility model discloses a flue gas treatment box, including flue gas treatment box (1), flue gas adsorption box (4), flue gas treatment box (1), flue gas treatment box (4), flue gas treatment box (1) and flue gas atomization box (2), flue gas atomization box (2) and flue gas primary purification box (3) are connected through second pipeline (8) between the inlet end, flue gas primary purification box (3) go out the gas end and be connected through third pipeline (9) with flue gas adsorption box (4) inlet end, be connected through fourth pipeline (10) between flue gas adsorption box (4) go out the gas end and flue gas secondary purification box (5) inlet end, flue gas secondary purification box (5) go out the gas end and install exhaust duct (11).
2. A flue gas cleaning system of a thermal power plant according to claim 1, wherein: the utility model provides a flue gas treatment box (1) inner chamber installation granule filter screen subassembly (12), granule filter screen subassembly (12) are including frame (13), elementary particle filter screen (14), well elementary particle filter screen (15) and high-efficient granule filter screen (16), elementary particle filter screen, well elementary particle filter screen (15) and high-efficient granule filter screen (16) are installed in proper order in frame (13), frame (13) movable mounting is in flue gas treatment box (1).
3. A flue gas cleaning system of a thermal power plant according to claim 1, wherein: the utility model provides a flue gas atomizing box (2) inner chamber installation atomizing subassembly, atomizing subassembly includes shower (17), atomizer (18) and atomizing box (19), shower (17) are installed in flue gas atomizing box (2) inner roof, atomizer (18) equidistant are installed on shower (17), atomizer (19) are installed in flue gas atomizing box (19) outer top, just shower (17) and atomizing box (19) intercommunication, install high-pressure pump body (20) in atomizer (19).
4. A flue gas cleaning system of a thermal power plant according to claim 1, wherein: the atomizing box (20) is internally filled with an alkaline solution, and the alkaline solution is formed by mixing sodium carbonate solution, sodium bicarbonate solution and water.
5. A flue gas cleaning system of a thermal power plant according to claim 1, wherein: the flue gas primary purification box (3) is internally provided with a primary adsorption component (21), the primary adsorption component (21) comprises a first adsorption net (22), a first adsorption coating (23) and a second adsorption coating (24), the first adsorption coating (23) and the second adsorption coating (24) are respectively coated on two sides of the first adsorption net (22), and the components of the first adsorption coating (23) and the second adsorption coating (24) comprise 30-40 parts by weight of fly ash, 20-30 parts by weight of metakaolin, 5-10 parts by weight of coconut shell powder, 6-12 parts by weight of peat, 20-30 parts by weight of VAE emulsion, 30-50 parts by weight of borate coupling agent, 10-20 parts by weight of polypropylene microsphere and 5-12 parts by weight of shell powder.
6. A flue gas cleaning system of a thermal power plant according to claim 1, wherein: the flue gas adsorption box (5) is internally provided with a plurality of first adsorption carbon rods (25) and a plurality of second adsorption carbon rods (31), the first adsorption carbon rods (25) are perpendicular to the inner top wall of the flue gas adsorption box (5), the second adsorption carbon rods (31) are perpendicular to the inner bottom wall of the flue gas adsorption box (5), and the first adsorption carbon rods (25) and the second adsorption carbon rods (31) are arranged in a staggered mode.
7. A flue gas cleaning system of a thermal power plant according to claim 1, wherein: the secondary adsorption component is arranged on the smoke secondary purifying box and comprises a first single-layer ceramic porous filter plate (26), a second single-layer ceramic porous filter plate (27), a first microwave generator (28), a second microwave generator (29) and an ozone generator (30), wherein the ozone generator (30) is arranged between the first microwave generator (28) and the second microwave generator (29), the first single-layer ceramic porous filter plate (26) is arranged on one side of the second microwave generator (29), and the second single-layer ceramic porous filter plate (27) is arranged on one side of the first microwave generator (28).
8. A method for realizing the purification of a flue gas purification system of a thermal power plant according to claim 1, which is characterized in that: the purification method comprises the following steps:
A. the flue gas of the thermal power plant enters a flue gas treatment box through a flue gas inlet pipe;
B. the flue gas is subjected to multistage filtration through a particle filter screen assembly, so that large particle impurities in the flue gas are removed;
C. then the flue gas enters a flue gas atomization box, alkaline solution in the flue gas atomization box is sprayed out from an atomization nozzle to be uniformly mixed with the flue gas for reaction, and acidic substances in the flue gas are removed;
D. then the flue gas enters a primary flue gas purifying box and is subjected to desulfurization and denitrification treatment through the adsorption of the first adsorption coating and the second adsorption coating;
E. then the flue gas enters a flue gas adsorption box, and peculiar smell removal treatment is carried out on the flue gas through carbon rods which are arranged in a staggered manner;
F. finally, the flue gas enters a secondary flue gas purifying box to further decompose and treat harmful substances in the flue gas and then is discharged.
CN202311476863.1A 2023-11-08 2023-11-08 Flue gas purification system and method for thermal power plant Withdrawn CN117398825A (en)

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CN202311476863.1A CN117398825A (en) 2023-11-08 2023-11-08 Flue gas purification system and method for thermal power plant

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Application Number Priority Date Filing Date Title
CN202311476863.1A CN117398825A (en) 2023-11-08 2023-11-08 Flue gas purification system and method for thermal power plant

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CN117398825A true CN117398825A (en) 2024-01-16

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Application publication date: 20240116