WO2023050897A1 - Flue gas low-temperature desulfurization and denitrification system for rotary kiln combustion furnace of garbage power plant - Google Patents

Flue gas low-temperature desulfurization and denitrification system for rotary kiln combustion furnace of garbage power plant Download PDF

Info

Publication number
WO2023050897A1
WO2023050897A1 PCT/CN2022/099162 CN2022099162W WO2023050897A1 WO 2023050897 A1 WO2023050897 A1 WO 2023050897A1 CN 2022099162 W CN2022099162 W CN 2022099162W WO 2023050897 A1 WO2023050897 A1 WO 2023050897A1
Authority
WO
WIPO (PCT)
Prior art keywords
flue gas
temperature
inlet
desulfurization
gas inlet
Prior art date
Application number
PCT/CN2022/099162
Other languages
French (fr)
Chinese (zh)
Inventor
李卫东
汪世清
梁鹤涛
许世森
郜时旺
肖平
刘练波
牛红伟
虢德军
Original Assignee
中国华能集团清洁能源技术研究院有限公司
华能湖南岳阳发电有限责任公司
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 中国华能集团清洁能源技术研究院有限公司, 华能湖南岳阳发电有限责任公司 filed Critical 中国华能集团清洁能源技术研究院有限公司
Publication of WO2023050897A1 publication Critical patent/WO2023050897A1/en

Links

Images

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/02Separation 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
    • B01D53/04Separation 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/46Removing components of defined structure
    • B01D53/48Sulfur compounds
    • B01D53/50Sulfur oxides
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/46Removing components of defined structure
    • B01D53/54Nitrogen compounds
    • B01D53/56Nitrogen oxides
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23GCREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/20Incineration of waste; Incinerator constructions; Details, accessories or control therefor having rotating or oscillating drums
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23GCREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/44Details; Accessories
    • F23G5/46Recuperation of heat
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23JREMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00Arrangements of devices for treating smoke or fumes
    • F23J15/02Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23JREMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00Arrangements of devices for treating smoke or fumes
    • F23J15/06Arrangements of devices for treating smoke or fumes of coolers
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/25Process efficiency

Definitions

  • This application relates to the technical field of gas purification, in particular to a low-temperature desulfurization and denitrification system for flue gas from a rotary kiln combustion furnace in a waste power plant.
  • the composition of the flue gas produced during the combustion process is also extremely complex.
  • the flue gas of the garbage power plant contains nitrogen oxides and sulfur dioxide, and the flue gas must be desulfurized and denitrified before being discharged.
  • the flue gas is directly denitrated at high temperature, and then desulfurized, and the denitrification efficiency is low.
  • the denitrification reflection device is installed in the waste heat boiler.
  • the raw material for denitrification is urea, and the urea is prepared into a certain concentration of urea solution, and then the urea solution is sprayed into the waste heat boiler furnace with a pump.
  • the temperature in the furnace is around 1000°C.
  • the high-temperature flue gas is fully mixed for a certain period of time in the furnace body of the misty urea solution.
  • NOx reacts with misty urea solution; when the amount of NOx is half of the content of urea, the removal rate of nitrogen oxides is about 30%-50%, so the desulfurization rate is low .
  • This application aims to solve one of the technical problems in the related art at least to a certain extent.
  • the embodiment of the present application proposes a low-temperature desulfurization and denitrification system for flue gas from a rotary kiln combustion furnace of a waste power plant.
  • a rotary kiln combustion furnace the rotary kiln combustion furnace includes a flue gas discharge port;
  • a waste heat boiler the waste heat boiler includes a first flue gas inlet and a first flue gas outlet, and the flue gas discharge port communicates with the first flue gas inlet so as to pass flue gas into the waste heat boiler so that The flue gas heats the waste heat boiler, thereby reducing the temperature of the flue gas;
  • An absorption refrigerating unit includes a steam generator and an evaporator
  • the steam generator includes a second flue gas inlet and a second flue gas outlet
  • the evaporator includes a third flue gas inlet and a third a flue gas outlet
  • the first flue gas outlet communicates with the second flue gas inlet, so as to pass the flue gas into the steam generator, thereby reducing the temperature of the flue gas;
  • a desulfurization tower the desulfurization tower is provided with slaked lime for desulfurization, the desulfurization tower includes a fourth flue gas inlet and a fourth flue gas outlet, and the second flue gas outlet communicates with the fourth flue gas inlet, so that passing the flue gas into the desulfurization tower to desulfurize the flue gas,
  • the fourth flue gas outlet communicates with the third flue gas inlet, so as to pass the flue gas into the evaporator, thereby reducing the temperature of the flue gas;
  • a low-temperature adsorption tower the low-temperature adsorption tower includes a fifth flue gas inlet and a fifth flue gas outlet, and the third flue gas outlet communicates with the fifth flue gas inlet so that the flue gas can be passed into the low-temperature In the adsorption tower, the flue gas is desulfurized and denitrified.
  • the waste heat power plant rotary kiln combustion furnace flue gas low-temperature desulfurization and denitrification system of the embodiment of the present application cools the flue gas through the waste heat boiler and the absorption refrigeration unit to reduce the temperature of the flue gas. After cooling, the flue gas is desulfurized in the desulfurization tower. The desulfurization efficiency of the final flue gas is high, so the desulfurization rate of the low-temperature desulfurization and denitrification system for the flue gas of the rotary kiln combustion furnace of the waste power plant in the embodiment of the present application is increased.
  • the flue gas after the desulfurization treatment of the desulfurization tower is cooled again by the absorption refrigeration unit, and the flue gas after cooling is subjected to desulfurization and denitrification treatment in the low-temperature adsorption tower.
  • the low-temperature desulfurization and denitrification system for the flue gas of the rotary kiln combustion furnace of the waste power plant in the embodiment of the present application further includes a cooling tower, the cooling tower includes a sixth flue gas inlet and a sixth flue gas outlet, and the sixth flue gas
  • the gas inlet is connected with the second flue gas inlet so that the flue gas can be passed into the cooling tower to reduce the temperature of the flue gas
  • the sixth flue gas outlet is connected with the fourth flue gas inlet communicated, so that the second flue gas outlet communicates with the fourth flue gas inlet.
  • the dust collector includes an air inlet and an air outlet, the air inlet communicates with the fourth flue gas outlet so as to pass the flue gas into the dust collector, and the air outlet It communicates with the third flue gas inlet, so that the fourth flue gas outlet communicates with the third flue gas inlet.
  • the waste gas power plant rotary kiln combustion furnace flue gas low-temperature desulfurization and denitrification system of the embodiment of the present application further includes a precooler, the precooler includes a seventh flue gas inlet and a seventh flue gas outlet, and the first The seventh flue gas inlet communicates with the gas outlet so that the flue gas can be passed into the precooler to reduce the temperature of the flue gas; the seventh flue gas outlet is connected to the third flue gas inlet communicated so that the gas outlet communicates with the third flue gas inlet.
  • the precooler includes a first heat exchange assembly and a second heat exchange assembly
  • the first heat exchange assembly includes the seventh flue gas inlet and the seventh flue gas outlet
  • the The second heat exchange component can be fed with low-temperature fluid
  • the seventh flue gas inlet communicates with the gas outlet, so that the flue gas can be passed into the first heat exchange component, thereby reducing the temperature of the flue gas .
  • the second heat exchange component has an eighth flue gas inlet and an eighth flue gas outlet, and the eighth flue gas inlet communicates with the fifth flue gas outlet so that the flue gas can pass through
  • the second heat exchange component is used to make the flue gas form the low-temperature fluid.
  • the low-temperature desulfurization and denitrification system for the flue gas of the rotary kiln combustion furnace of the garbage power plant further includes an induced draft fan, which is arranged between the precooler and the dust collector, and the induced draft fan is arranged between the precooler and the dust collector.
  • the air inlet of the fan communicates with the air outlet, and the air outlet of the induced fan communicates with the seventh flue gas inlet, so that the seventh flue gas inlet communicates with the air outlet.
  • the low-temperature desulfurization and denitrification system for the flue gas of the rotary kiln combustion furnace of the garbage power plant in the embodiment of the present application further includes a chimney, and the chimney communicates with the fifth flue gas outlet or the eighth flue gas outlet for discharging the smoke.
  • the waste heat boiler includes a flue gas pipeline
  • the flue gas pipeline includes the first flue gas inlet and the first flue gas outlet
  • the flue gas pipeline is used to heat the waste heat boiler.
  • Fig. 1 is a schematic structural diagram of a low-temperature desulfurization and denitrification system for flue gas from a rotary kiln combustion furnace in a waste-to-energy power plant according to an embodiment of the present application.
  • Fig. 2 is a schematic structural diagram of a low-temperature desulfurization and denitrification system for flue gas from a rotary kiln combustion furnace in a waste-to-energy power plant according to an embodiment of the present application.
  • Waste heat boiler 2 first flue gas inlet 21; first flue gas outlet 22;
  • Absorption refrigeration unit 3 steam generator 31; second flue gas inlet 311; second flue gas outlet 312; evaporator 32; third flue gas inlet 321; third flue gas outlet 322;
  • Desulfurization tower 4 fourth flue gas inlet 41; fourth flue gas outlet 42;
  • Dust collector 7 air inlet 71; air outlet 72; dust outlet 73;
  • Precooler 9 first heat exchange component 91; seventh flue gas inlet 911; seventh flue gas outlet 912; second heat exchange component 92; eighth flue gas inlet 921; eighth flue gas outlet 922;
  • the low-temperature desulfurization and denitrification system of the rotary kiln combustion furnace flue gas of the waste power plant includes a rotary kiln combustion furnace 1, a waste heat boiler 2, an absorption refrigeration unit 3, a desulfurization tower 4 and a low-temperature adsorption tower 5.
  • the rotary kiln combustion furnace 1 includes a flue gas discharge port 11. Specifically, the rotary kiln combustion furnace 1 has a flue gas discharge port 11, so that the high-temperature flue gas generated in the rotary kiln combustion furnace 1 (the temperature of the high-temperature flue gas is between 1100 ° C and 1200°C) is discharged from the flue gas discharge port 11 of the rotary kiln combustion furnace 1.
  • the waste heat boiler 2 includes a first flue gas inlet 21 and a first flue gas outlet 22, and the flue gas discharge port 11 communicates with the first flue gas inlet 21 so as to pass the flue gas into the waste heat boiler 2 so that the flue gas heats the waste heat boiler 2, thereby reducing the temperature of the flue gas.
  • the high-temperature flue gas discharged from the flue gas discharge port 11 of the rotary kiln combustion furnace 1 enters the waste heat boiler 2 through the first flue gas inlet 21 .
  • the heat exchange between the high-temperature flue gas and the waste heat boiler 2, and the heat exchange between the high-temperature flue gas and the water in the waste heat boiler 2 can reduce the temperature of the high-temperature flue gas, wherein the temperature of the high-temperature flue gas after reducing the temperature is 300°C -350°C, the cooled high-temperature flue gas is discharged from the first flue gas outlet 22 of the waste heat boiler 2 .
  • the waste heat boiler 2 can absorb the heat of the high-temperature flue gas, thereby improving the utilization rate of the heat released by fuel combustion.
  • the absorption refrigeration unit 3 includes a steam generator 31 and an evaporator 32, the steam generator 31 includes a second flue gas inlet 311 and a second flue gas outlet 312, and the evaporator 32 includes a third flue gas inlet 321 and a third flue gas outlet 322, the first flue gas outlet 22 communicates with the second flue gas inlet 311, so as to pass the flue gas into the steam generator 31, thereby reducing the temperature of the flue gas.
  • the flue gas discharged from the waste heat boiler 2 enters the steam generator 31 through the second flue gas inlet 311 of the steam generator 31, and the flue gas exchanges heat with the coolant in the steam generator 31, thereby evaporating the coolant. And absorb the heat of the flue gas, and further, the cooled flue gas is discharged from the second flue gas outlet 312 of the steam generator 31 .
  • the desulfurization tower 4 includes a fourth flue gas inlet 41 and a fourth flue gas outlet 42, the second flue gas outlet 312 communicates with the fourth flue gas inlet 41, so that the flue gas is passed into the desulfurization tower 4, thereby desulfurizing the flue gas .
  • the flue gas discharged from the steam generator 31 enters the desulfurization tower 4 through the fourth flue gas inlet 41, and the flue gas is desulfurized in the desulfurization tower 4 to remove sulfur-containing compounds in the flue gas. After treatment, it is discharged from the fourth flue gas outlet 42 of the desulfurization tower 4 .
  • the fourth flue gas outlet 42 communicates with the third flue gas inlet 321 so as to pass the flue gas into the evaporator 32 to reduce the temperature of the flue gas.
  • the desulfurized flue gas is discharged through the fourth flue gas outlet 42 of the desulfurization tower 4, and enters the evaporator 32 from the third flue gas inlet 321 of the evaporator 32, so that the flue gas is separated from the refrigerant in the evaporator 32. heat exchange, thereby reducing the temperature of the flue gas.
  • Slaked lime is arranged in the desulfurization tower.
  • the desulfurization tower 4 desulfurizes the flue gas by reacting slaked lime with the flue gas, so the desulfurization tower can remove sulfur-containing compounds in the flue gas.
  • the desulfurization treatment of the flue gas by the desulfurization tower 4 includes dry desulfurization and semi-dry desulfurization.
  • dry desulfurization is used to remove sulfur-containing compounds in flue dust, wherein dry slaked lime is used as an absorbent, and the flue gas in the desulfurization tower 4 is reacted with dry slaked lime, thereby removing sulfur-containing compounds in the flue gas.
  • semi-dry desulfurization is used to remove sulfur compounds in the flue dust.
  • the slaked lime slurry is sprayed in the desulfurization tower 4, so that the slaked lime slurry is evenly distributed in the desulfurization tower 4, and the flue gas reacts with the slaked lime in the desulfurization tower 4, thereby removing sulfur compounds in the flue gas.
  • the low-temperature adsorption tower 5 includes the fifth flue gas inlet 51 and the fifth flue gas outlet 52, and the third flue gas outlet 322 communicates with the fifth flue gas inlet 51, so that the flue gas is passed into the low-temperature adsorption tower 5, thereby the flue gas For desulfurization and denitrification.
  • the desulfurized flue gas that has been cooled is discharged through the third flue gas outlet 322 of the evaporator 32, and enters the low-temperature adsorption tower 5 from the fifth flue gas inlet 51 of the low-temperature adsorption tower 5 for desulfurization and denitration treatment.
  • the desulfurized and denitrified flue gas is discharged to the outside through the fifth flue gas outlet 52 .
  • the waste heat power plant rotary kiln combustion furnace flue gas low-temperature desulfurization and denitrification system of the embodiment of the present application cools the flue gas through the waste heat boiler 2 and the absorption refrigeration unit 3 to reduce the temperature of the flue gas. After cooling, the flue gas is desulfurized in the desulfurization tower 4 , the desulfurization efficiency of the flue gas after cooling is high, so the desulfurization rate of the low-temperature desulfurization and denitrification system for the flue gas of the rotary kiln combustion furnace of the waste power plant in the embodiment of the present application is increased.
  • the flue gas desulfurized by the desulfurization tower 4 is cooled again by the absorption refrigeration unit 3, and the flue gas after cooling is subjected to desulfurization and denitrification treatment in the low-temperature adsorption tower 5, and the desulfurization and desulfurization efficiency of the flue gas after cooling again is high, so
  • the denitrification rate of the low-temperature desulfurization and denitrification system for the flue gas of the rotary kiln combustion furnace of the waste power plant in the embodiment of the present application is increased.
  • the low-temperature desulfurization and denitrification system for the flue gas of the rotary kiln combustion furnace of the garbage power plant has the advantages of high desulfurization rate and high denitrification rate.
  • the low-temperature desulfurization and denitrification system for the flue gas of the rotary kiln combustion furnace of the waste power plant in the embodiment of the present application further includes a cooling tower 6, and the cooling tower 6 includes a sixth flue gas inlet 61 and a sixth flue gas inlet 61.
  • the outlet 62, the sixth flue gas inlet 61 communicates with the second flue gas inlet 311, so as to pass the flue gas into the cooling tower 6, thereby reducing the temperature of the flue gas, and the sixth flue gas outlet 62 communicates with the fourth flue gas inlet 41 , so that the second flue gas outlet 312 communicates with the fourth flue gas inlet 41 .
  • the flue gas cooled by the steam generator 31 is discharged from the second flue gas inlet 311 , enters the cooling tower 6 through the sixth flue gas inlet 61 , and the flue gas is cooled in the cooling tower 6 .
  • the flue gas is discharged through the sixth flue gas outlet 62 and enters the desulfurization tower 4 through the fourth flue gas inlet 41 .
  • the low-temperature desulfurization and denitrification system for the flue gas of the rotary kiln combustion furnace of the garbage power plant in the embodiment of the present application has the advantage of environmental protection.
  • the low-temperature desulfurization and denitrification system for the flue gas of the rotary kiln combustion furnace of the waste power plant in the embodiment of the present application further includes a dust collector 7, and the dust collector 7 includes an air inlet 71 and an air outlet 72, and the air inlet
  • the port 71 communicates with the fourth flue gas outlet 42 so as to pass the flue gas into the dust collector 7
  • the gas outlet 72 communicates with the third flue gas inlet 321 so that the fourth flue gas outlet 42 communicates with the third flue gas inlet 321 .
  • the flue gas desulfurized by the desulfurization tower 4 is discharged from the fourth flue gas outlet 42, enters the dust collector 7 through the air inlet 71 of the dust collector 7, and the flue gas is subjected to dust removal treatment in the dust collector 7, and then removed
  • the soot in the flue gas makes the flue gas discharged to the outside without soot, and then achieves the purpose of environmental protection.
  • the dust collector 7 has a dust outlet 73, through which the smoke and dust filtered by the dust collector 7 are discharged, and then the filtered smoke and dust are recycled to avoid secondary pollution to the environment.
  • the low-temperature desulfurization and denitrification system for the flue gas of the rotary kiln combustion furnace of the garbage power plant in the embodiment of the present application has the advantage of environmental protection.
  • the low-temperature desulfurization and denitrification system for flue gas from the rotary kiln combustion furnace of the waste power plant in the embodiment of the present application further includes a precooler 9, and the precooler 9 includes a seventh flue gas inlet 911 and a seventh flue gas inlet 911.
  • the flue gas outlet 912 and the seventh flue gas inlet 911 communicate with the gas outlet 72 so as to pass the flue gas into the precooler 9 to reduce the temperature of the flue gas.
  • the seventh flue gas outlet 912 communicates with the third flue gas inlet 321 , so that the gas outlet 72 communicates with the third flue gas inlet 321 .
  • the flue gas dedusted by the dust collector 7 is discharged from the gas outlet 72 of the dust collector 7, enters the precooler 9 through the seventh flue gas inlet 911 of the precooler 9, and the flue gas is cooled in the precooler 9.
  • the cooled flue gas is discharged through the seventh flue gas outlet 912 and enters the evaporator 32 through the third flue gas inlet 321 .
  • the precooler 9 includes a first heat exchange assembly 91 and a second heat exchange assembly 92
  • the first heat exchange assembly 91 includes a seventh flue gas inlet 911 and a seventh flue gas outlet 912
  • the second heat exchange assembly 92 can The low-temperature fluid is passed through, and the seventh flue gas inlet 911 communicates with the gas outlet 72, so as to pass the flue gas into the first heat exchange component 91, thereby reducing the temperature of the flue gas.
  • the flue gas dedusted by the dust collector 7 enters the first heat exchange assembly 91 through the seventh flue gas inlet 911, and the flue gas in the first heat exchange assembly 91 and the low-temperature fluid in the second heat exchange assembly 92 Heat exchange is performed, thereby reducing the temperature of the flue gas in the first heat exchange assembly 91 .
  • the cooled flue gas is discharged through the seventh flue gas outlet 912 of the first heat exchange component 91 , and enters the evaporator 32 through the third flue gas inlet 321 to be cooled again.
  • the second heat exchanging assembly 92 has an eighth flue gas inlet 921 and an eighth flue gas outlet 922, and the eighth flue gas inlet 921 communicates with the fifth flue gas outlet 52, so that the flue gas passes into the second heat exchanging assembly 92 , so that the flue gas forms a low-temperature fluid.
  • the flue gas desulfurized and denitrified by the low-temperature adsorption tower 5 is discharged through the fifth flue gas outlet 52 , and enters the second heat exchange assembly 92 through the eighth flue gas inlet 921 of the second heat exchange assembly 92 . It can be understood that the flue gas in the cryogenic adsorption tower 5 is cooled again through the evaporator 32, and then the temperature of the flue gas discharged from the cryogenic adsorption tower 5 is lower than that of the flue gas in the first heat exchange assembly 91.
  • the exhausted flue gas forms a low-temperature fluid, and the low-temperature fluid formed by the flue gas exchanges heat with the flue gas of the first heat exchange component 91 in the second heat exchange component 92, thereby reducing the temperature of the flue gas in the first heat exchange component 91. temperature. Therefore, the low-temperature desulfurization and denitrification system for the flue gas of the rotary kiln combustion furnace of the garbage power plant in the embodiment of the present application has the advantage of saving energy.
  • the low-temperature desulfurization and denitrification system for the flue gas of the rotary kiln combustion furnace of the waste power plant in the embodiment of the present application further includes an induced draft fan 8, and the induced draft fan 8 is arranged between the precooler 9 and the dust collector 7 , the air inlet of the induced draft fan 8 communicates with the air outlet 72 , and the air outlet of the induced draft fan 8 communicates with the seventh flue gas inlet 911 , so that the seventh flue gas inlet 911 communicates with the air outlet 72 .
  • the induced draft fan 8 has a ninth flue gas inlet 81 and a ninth flue gas outlet 82 , wherein the ninth flue gas inlet 81 is the air inlet of the induced draft fan 8 , and the ninth flue gas outlet 82 is the air outlet of the induced draft fan 8 .
  • the ninth flue gas inlet 81 of the induced draft fan 8 communicates with the gas outlet 72 of the dust collector 7
  • the ninth flue gas outlet 82 of the induced draft fan 8 communicates with the seventh flue gas inlet 911 of the precooler 9 .
  • the induced draft fan 8 can increase the flow velocity of the flue gas, thereby increasing the flue gas treatment efficiency in the low-temperature desulfurization and denitrification system for the flue gas of the rotary kiln combustion furnace of the waste power plant according to the embodiment of the present application.
  • the low-temperature desulfurization and denitrification system for flue gas from the rotary kiln combustion furnace of the garbage power plant in the embodiment of the present application further includes a chimney, the chimney and the fifth flue gas outlet 52 or the eighth flue gas outlet 922 for discharging flue gas.
  • the chimney communicates with the fifth flue gas outlet 52 of the low-temperature adsorption tower 5, so that the flue gas discharged from the low-temperature adsorption tower 5 is discharged through the chimney.
  • the chimney communicates with the eighth flue gas outlet 922 of the precooler 9, so that the flue gas discharged from the precooler 9 is discharged through the chimney.
  • the waste heat boiler 2 includes a flue gas pipeline
  • the flue gas pipeline includes a first flue gas inlet 21 and a first flue gas outlet 22
  • the flue gas pipeline is used for heating the waste heat boiler 2 .
  • the high-temperature flue gas discharged from the rotary kiln combustion furnace 1 enters the flue gas pipe from the first flue gas inlet 21 of the flue gas pipe, and the high-temperature flue gas exchanges heat with the waste heat boiler 2 in the flue gas pipe, thereby reducing the temperature of the high-temperature flue gas. air temperature.
  • first and second are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features.
  • the features defined as “first” and “second” may explicitly or implicitly include at least one of these features.
  • “plurality” means at least two, such as two, three, etc., unless otherwise specifically defined.
  • a first feature being "on” or “under” a second feature may mean that the first and second features are in direct contact, or that the first and second features are indirect through an intermediary. touch.
  • “above”, “above” and “above” the first feature on the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.
  • “Below”, “beneath” and “beneath” the first feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is less horizontally than the second feature.
  • the terms “one embodiment,” “some embodiments,” “example,” “specific examples,” or “some examples” mean specific features, structures, materials, or features described in connection with the embodiment or examples. Features are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the described specific features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples and features of different embodiments or examples described in this specification without conflicting with each other.

Landscapes

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

Abstract

A flue gas low-temperature desulfurization and denitrification system for a rotary kiln combustion furnace of a garbage power plant. The system comprises a rotary kiln combustion furnace (1), a waste heat boiler (2), an absorption refrigeration unit (3), a desulfurization tower (4), and a low-temperature adsorption tower (5), wherein the absorption refrigeration unit (3) comprises a steam generator (31) and an evaporator (32); a flue gas discharge port (11) of the rotary kiln combustion furnace (1) is in communication with a first flue gas inlet (21) of the waste heat boiler (2); a first flue gas outlet (22) of the waste heat boiler (2) is in communication with a second flue gas inlet (311) of the steam generator (31); a second flue gas outlet (312) of the steam generator (31) is in communication with a fourth flue gas inlet (41) of the desulfurization tower (4); a fourth flue gas outlet (42) of the desulfurization tower (4) is in communication with a third flue gas inlet (321) of the evaporator (32); a third flue gas outlet (322) of the evaporator (32) is in communication with a fifth flue gas inlet (51) of the low-temperature adsorption tower (5); and treated flue gas is discharged to the outside from a fifth flue gas outlet (52) of the low-temperature adsorption tower (5). The flue gas low-temperature desulfurization and denitrification system for a rotary kiln combustion furnace of a garbage power plant has the advantages of a high desulfurization rate and a high denitration rate.

Description

垃圾电厂回转窑燃烧炉烟气低温脱硫脱硝系统Low-temperature desulfurization and denitrification system for flue gas of rotary kiln combustion furnace in waste power plant
交叉引用cross reference
本申请要求在2021年9月28日提交中国国家知识产权局、申请号为202122371166.2、发明名称为“垃圾电厂回转窑燃烧炉烟气低温脱硫脱硝系统”的中国专利申请的优先权,其全部内容通过引用结合在本申请中。This application claims the priority of the Chinese patent application submitted to the State Intellectual Property Office of China on September 28, 2021, the application number is 202122371166.2, and the invention title is "Low-temperature desulfurization and denitrification system for flue gas from rotary kiln combustion furnace of waste power plant", the entire content of which Incorporated in this application by reference.
技术领域technical field
本申请涉及气体净化的技术领域,具体地,涉及一种垃圾电厂回转窑燃烧炉烟气低温脱硫脱硝系统。This application relates to the technical field of gas purification, in particular to a low-temperature desulfurization and denitrification system for flue gas from a rotary kiln combustion furnace in a waste power plant.
背景技术Background technique
城市生活垃圾由于其成分较为复杂,所以在燃烧过程中产生的烟气成分也极其复杂。其中垃圾电厂的烟气含有氮氧化物和二氧化硫,将烟气排放前必须进行脱硫脱硝。相关技术中,垃圾电厂的烟气从回转窑燃烧炉排出后,烟气直接在高温下进行脱硝,再进行脱硫,脱硝效率低。Due to the complex composition of municipal solid waste, the composition of the flue gas produced during the combustion process is also extremely complex. Among them, the flue gas of the garbage power plant contains nitrogen oxides and sulfur dioxide, and the flue gas must be desulfurized and denitrified before being discharged. In related technologies, after the flue gas from the garbage power plant is discharged from the rotary kiln combustion furnace, the flue gas is directly denitrated at high temperature, and then desulfurized, and the denitrification efficiency is low.
发明内容Contents of the invention
本申请是基于发明人对以下事实和问题的发现和认识做出的:This application is based on the inventor's discovery and recognition of the following facts and problems:
在相关技术中,脱硝的反映装置安装到余热锅炉内。脱硝的原料选用尿素,将尿素配置成一定浓度的尿素溶液,然后用泵尿素溶液喷入余热锅炉炉内,在炉内设有喷枪,可以将进入炉内的尿素溶液进行雾化。在炉内的温度在1000℃左右。高温烟气在有雾状的尿素溶液的炉体内,进行一定的时间充分混匀。在锅炉内有气态氧的情况下,NOx与雾态的尿素溶液发生反应;在NOx的量是尿素的含量一半的时候,氮氧化物的去除率大致在30%-50%,因此脱硫率低。In related technologies, the denitrification reflection device is installed in the waste heat boiler. The raw material for denitrification is urea, and the urea is prepared into a certain concentration of urea solution, and then the urea solution is sprayed into the waste heat boiler furnace with a pump. There is a spray gun in the furnace to atomize the urea solution entering the furnace. The temperature in the furnace is around 1000°C. The high-temperature flue gas is fully mixed for a certain period of time in the furnace body of the misty urea solution. In the case of gaseous oxygen in the boiler, NOx reacts with misty urea solution; when the amount of NOx is half of the content of urea, the removal rate of nitrogen oxides is about 30%-50%, so the desulfurization rate is low .
本申请旨在至少在一定程度上解决相关技术中的技术问题之一。This application aims to solve one of the technical problems in the related art at least to a certain extent.
为此,本申请的实施例提出一种垃圾电厂回转窑燃烧炉烟气低温脱硫脱硝系统,所述垃圾电厂回转窑燃烧炉烟气低温脱硫脱硝系统具有脱硫率高和脱硝率高的优点。For this reason, the embodiment of the present application proposes a low-temperature desulfurization and denitrification system for flue gas from a rotary kiln combustion furnace of a waste power plant.
根据本申请实施例的垃圾电厂回转窑燃烧炉烟气低温脱硫脱硝系统包括:The low-temperature desulfurization and denitrification system for the flue gas of the rotary kiln combustion furnace of the garbage power plant according to the embodiment of the present application includes:
回转窑燃烧炉,所述回转窑燃烧炉包括烟气排放口;A rotary kiln combustion furnace, the rotary kiln combustion furnace includes a flue gas discharge port;
余热锅炉,所述余热锅炉包括第一烟气进口和第一烟气出口,所述烟气排放口与所述第一烟气进口连通,以便将烟气通入所述余热锅炉内,以使所述烟气加热所述余热锅炉, 从而降低所述烟气的温度;A waste heat boiler, the waste heat boiler includes a first flue gas inlet and a first flue gas outlet, and the flue gas discharge port communicates with the first flue gas inlet so as to pass flue gas into the waste heat boiler so that The flue gas heats the waste heat boiler, thereby reducing the temperature of the flue gas;
吸收式制冷机组,所述吸收式制冷机组包括蒸气发生器和蒸发器,所述蒸气发生器包括第二烟气进口和第二烟气出口,所述蒸发器包括第三烟气进口和第三烟气出口,所述第一烟气出口与所述第二烟气进口连通,以便将所述烟气通入所述蒸气发生器内,从而降低所述烟气的温度;An absorption refrigerating unit, the absorption refrigerating unit includes a steam generator and an evaporator, the steam generator includes a second flue gas inlet and a second flue gas outlet, and the evaporator includes a third flue gas inlet and a third a flue gas outlet, the first flue gas outlet communicates with the second flue gas inlet, so as to pass the flue gas into the steam generator, thereby reducing the temperature of the flue gas;
脱硫塔,所述脱硫塔内设有用于脱硫的熟石灰,所述脱硫塔包括第四烟气进口和第四烟气出口,所述第二烟气出口与所述第四烟气进口连通,以便将所述烟气通入所述脱硫塔内,从而对所述烟气进行脱硫,A desulfurization tower, the desulfurization tower is provided with slaked lime for desulfurization, the desulfurization tower includes a fourth flue gas inlet and a fourth flue gas outlet, and the second flue gas outlet communicates with the fourth flue gas inlet, so that passing the flue gas into the desulfurization tower to desulfurize the flue gas,
第四烟气出口与所述第三烟气进口连通,以便将所述烟气通入所述蒸发器内,从而降低所述烟气的温度;The fourth flue gas outlet communicates with the third flue gas inlet, so as to pass the flue gas into the evaporator, thereby reducing the temperature of the flue gas;
低温吸附塔,所述低温吸附塔包括第五烟气进口和第五烟气出口,所述第三烟气出口与所述第五烟气进口连通,以便将所述烟气通入所述低温吸附塔内,从而对所述烟气进行脱硫、脱硝。A low-temperature adsorption tower, the low-temperature adsorption tower includes a fifth flue gas inlet and a fifth flue gas outlet, and the third flue gas outlet communicates with the fifth flue gas inlet so that the flue gas can be passed into the low-temperature In the adsorption tower, the flue gas is desulfurized and denitrified.
本申请实施例的垃圾电厂回转窑燃烧炉烟气低温脱硫脱硝系统通过余热锅炉和吸收式制冷机组对烟气降温,使烟气的温度降低,降温后烟气在脱硫塔进行脱硫处理,经过降温后的烟气的脱硫效率高,因此增大了本申请实施例的垃圾电厂回转窑燃烧炉烟气低温脱硫脱硝系统的脱硫率。经过脱硫塔脱硫处理后的烟气通过吸收式制冷机组进行再次降温,降温后的烟气在低温吸附塔内进行脱硫脱硝处理,经过再次降温后的烟气脱硫和脱硫效率高,因此增大了本申请实施例的垃圾电厂回转窑燃烧炉烟气低温脱硫脱硝系统的脱硝率。The waste heat power plant rotary kiln combustion furnace flue gas low-temperature desulfurization and denitrification system of the embodiment of the present application cools the flue gas through the waste heat boiler and the absorption refrigeration unit to reduce the temperature of the flue gas. After cooling, the flue gas is desulfurized in the desulfurization tower. The desulfurization efficiency of the final flue gas is high, so the desulfurization rate of the low-temperature desulfurization and denitrification system for the flue gas of the rotary kiln combustion furnace of the waste power plant in the embodiment of the present application is increased. The flue gas after the desulfurization treatment of the desulfurization tower is cooled again by the absorption refrigeration unit, and the flue gas after cooling is subjected to desulfurization and denitrification treatment in the low-temperature adsorption tower. The denitrification rate of the low-temperature desulfurization and denitrification system for the flue gas of the rotary kiln combustion furnace of the waste power plant in the embodiment of the present application.
在一些实施例中,本申请实施例的垃圾电厂回转窑燃烧炉烟气低温脱硫脱硝系统还包括冷却塔,所述冷却塔包括第六烟气进口和第六烟气出口,所述第六烟气进口与所述第二烟气进口连通,以便将所述烟气通入所述冷却塔内,从而降低所述烟气的温度,所述第六烟气出口与所述第四烟气进口连通,以使所述第二烟气出口与所述第四烟气进口连通。In some embodiments, the low-temperature desulfurization and denitrification system for the flue gas of the rotary kiln combustion furnace of the waste power plant in the embodiment of the present application further includes a cooling tower, the cooling tower includes a sixth flue gas inlet and a sixth flue gas outlet, and the sixth flue gas The gas inlet is connected with the second flue gas inlet so that the flue gas can be passed into the cooling tower to reduce the temperature of the flue gas, and the sixth flue gas outlet is connected with the fourth flue gas inlet communicated, so that the second flue gas outlet communicates with the fourth flue gas inlet.
在一些实施例中,所述除尘器包括进气口和出气口,所述进气口与所述第四烟气出口连通,以便将所述烟气通入所述除尘器,所述出气口与所述第三烟气进口连通,以使第四烟气出口与所述第三烟气进口连通。In some embodiments, the dust collector includes an air inlet and an air outlet, the air inlet communicates with the fourth flue gas outlet so as to pass the flue gas into the dust collector, and the air outlet It communicates with the third flue gas inlet, so that the fourth flue gas outlet communicates with the third flue gas inlet.
在一些实施例中,本申请实施例的垃圾电厂回转窑燃烧炉烟气低温脱硫脱硝系统还包括预冷器,所述预冷器包括第七烟气进口和第七烟气出口,所述第七烟气进口与所述出气口连通,以便将所述烟气通入所述预冷器内,从而降低所述烟气的温度;所述第七烟气出口与所述第三烟气进口连通,以使所述出气口与所述第三烟气进口连通。In some embodiments, the waste gas power plant rotary kiln combustion furnace flue gas low-temperature desulfurization and denitrification system of the embodiment of the present application further includes a precooler, the precooler includes a seventh flue gas inlet and a seventh flue gas outlet, and the first The seventh flue gas inlet communicates with the gas outlet so that the flue gas can be passed into the precooler to reduce the temperature of the flue gas; the seventh flue gas outlet is connected to the third flue gas inlet communicated so that the gas outlet communicates with the third flue gas inlet.
在一些实施例中,所述预冷器包括第一换热组件和第二换热组件,所述第一换热组件包括所述第七烟气进口和所述第七烟气出口,所述第二换热组件能够通入低温流体,所述 第七烟气进口与所述出气口连通,以便将所述烟气通入所述第一换热组件内,从而降低所述烟气的温度。In some embodiments, the precooler includes a first heat exchange assembly and a second heat exchange assembly, the first heat exchange assembly includes the seventh flue gas inlet and the seventh flue gas outlet, the The second heat exchange component can be fed with low-temperature fluid, and the seventh flue gas inlet communicates with the gas outlet, so that the flue gas can be passed into the first heat exchange component, thereby reducing the temperature of the flue gas .
在一些实施例中,所述第二换热组件具有第八烟气进口和第八烟气出口,所述第八烟气进口与所述第五烟气出口连通,以便所述烟气通入所述第二换热组件,以使所述烟气形成所述低温流体。In some embodiments, the second heat exchange component has an eighth flue gas inlet and an eighth flue gas outlet, and the eighth flue gas inlet communicates with the fifth flue gas outlet so that the flue gas can pass through The second heat exchange component is used to make the flue gas form the low-temperature fluid.
在一些实施例中,本申请实施例的垃圾电厂回转窑燃烧炉烟气低温脱硫脱硝系统还包括引风机,所述引风机设在所述预冷器和所述除尘器之间,所述引风机的进风口与所述出气口连通,所述引风机的出风口与所述第七烟气进口连通,从而使所述第七烟气进口与所述出气口连通。In some embodiments, the low-temperature desulfurization and denitrification system for the flue gas of the rotary kiln combustion furnace of the garbage power plant according to the embodiment of the present application further includes an induced draft fan, which is arranged between the precooler and the dust collector, and the induced draft fan is arranged between the precooler and the dust collector. The air inlet of the fan communicates with the air outlet, and the air outlet of the induced fan communicates with the seventh flue gas inlet, so that the seventh flue gas inlet communicates with the air outlet.
在一些实施例中,本申请实施例的垃圾电厂回转窑燃烧炉烟气低温脱硫脱硝系统还包括烟筒,所述烟筒与所述第五烟气出口或所述第八烟气出口连通,以便排放所述烟气。In some embodiments, the low-temperature desulfurization and denitrification system for the flue gas of the rotary kiln combustion furnace of the garbage power plant in the embodiment of the present application further includes a chimney, and the chimney communicates with the fifth flue gas outlet or the eighth flue gas outlet for discharging the smoke.
在一些实施例中,所述余热锅炉包括烟气管道,所述烟气管道包括所述第一烟气进口和所述第一烟气出口,所述烟气管道用于加热所述余热锅炉。In some embodiments, the waste heat boiler includes a flue gas pipeline, the flue gas pipeline includes the first flue gas inlet and the first flue gas outlet, and the flue gas pipeline is used to heat the waste heat boiler.
附图说明Description of drawings
图1是本申请实施例的垃圾电厂回转窑燃烧炉烟气低温脱硫脱硝系统的结构示意图。Fig. 1 is a schematic structural diagram of a low-temperature desulfurization and denitrification system for flue gas from a rotary kiln combustion furnace in a waste-to-energy power plant according to an embodiment of the present application.
图2是本申请实施例的垃圾电厂回转窑燃烧炉烟气低温脱硫脱硝系统的结构示意图。Fig. 2 is a schematic structural diagram of a low-temperature desulfurization and denitrification system for flue gas from a rotary kiln combustion furnace in a waste-to-energy power plant according to an embodiment of the present application.
附图标记:Reference signs:
回转窑燃烧炉1;烟气排放口11;Rotary kiln combustion furnace 1; flue gas discharge port 11;
余热锅炉2;第一烟气进口21;第一烟气出口22; Waste heat boiler 2; first flue gas inlet 21; first flue gas outlet 22;
吸收式制冷机组3;蒸气发生器31;第二烟气进口311;第二烟气出口312;蒸发器32;第三烟气进口321;第三烟气出口322; Absorption refrigeration unit 3; steam generator 31; second flue gas inlet 311; second flue gas outlet 312; evaporator 32; third flue gas inlet 321; third flue gas outlet 322;
脱硫塔4;第四烟气进口41;第四烟气出口42; Desulfurization tower 4; fourth flue gas inlet 41; fourth flue gas outlet 42;
低温吸附塔5;第五烟气进口51;第五烟气出口52;Low temperature adsorption tower 5; fifth flue gas inlet 51; fifth flue gas outlet 52;
冷却塔6;第六烟气进口61;第六烟气出口62;Cooling tower 6; sixth flue gas inlet 61; sixth flue gas outlet 62;
除尘器7;进气口71;出气口72;出尘口73;Dust collector 7; air inlet 71; air outlet 72; dust outlet 73;
引风机8;第九烟气进口81;第九烟气出口82;induced draft fan 8; the ninth flue gas inlet 81; the ninth flue gas outlet 82;
预冷器9;第一换热组件91;第七烟气进口911;第七烟气出口912;第二换热组件92;第八烟气进口921;第八烟气出口922;Precooler 9; first heat exchange component 91; seventh flue gas inlet 911; seventh flue gas outlet 912; second heat exchange component 92; eighth flue gas inlet 921; eighth flue gas outlet 922;
具体实施方式Detailed ways
下面详细描述本申请的实施例,所述实施例的示例在附图中示出。下面通过参考附图描述的实施例是示例性的,旨在用于解释本申请,而不能理解为对本申请的限制。Embodiments of the application are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the figures are exemplary, and are intended to explain the present application, and should not be construed as limiting the present application.
下面参考附图描述本申请实施例的垃圾电厂回转窑燃烧炉烟气低温脱硫脱硝系统。The following describes the low-temperature desulfurization and denitrification system for the flue gas of the rotary kiln combustion furnace of the waste power plant according to the embodiment of the present application with reference to the accompanying drawings.
如图1所示,根据本申请实施例的垃圾电厂回转窑燃烧炉烟气低温脱硫脱硝系统包括回转窑燃烧炉1、余热锅炉2、吸收式制冷机组3、脱硫塔4和低温吸附塔5。As shown in Figure 1, the low-temperature desulfurization and denitrification system of the rotary kiln combustion furnace flue gas of the waste power plant according to the embodiment of the present application includes a rotary kiln combustion furnace 1, a waste heat boiler 2, an absorption refrigeration unit 3, a desulfurization tower 4 and a low-temperature adsorption tower 5.
回转窑燃烧炉1包括烟气排放口11,具体地,回转窑燃烧炉1具有烟气排放口11,进而使回转窑燃烧炉1中产生的高温烟气(高温烟气的温度处于1100℃-1200℃)从回转窑燃烧炉1的烟气排放口11排出。The rotary kiln combustion furnace 1 includes a flue gas discharge port 11. Specifically, the rotary kiln combustion furnace 1 has a flue gas discharge port 11, so that the high-temperature flue gas generated in the rotary kiln combustion furnace 1 (the temperature of the high-temperature flue gas is between 1100 ° C and 1200°C) is discharged from the flue gas discharge port 11 of the rotary kiln combustion furnace 1.
余热锅炉2包括第一烟气进口21和第一烟气出口22,烟气排放口11与第一烟气进口21连通,以便将烟气通入余热锅炉2内,以使烟气加热余热锅炉2,从而降低烟气的温度。具体地,从回转窑燃烧炉1的烟气排放口11排出高温烟气经过第一烟气进口21进入余热锅炉2中。The waste heat boiler 2 includes a first flue gas inlet 21 and a first flue gas outlet 22, and the flue gas discharge port 11 communicates with the first flue gas inlet 21 so as to pass the flue gas into the waste heat boiler 2 so that the flue gas heats the waste heat boiler 2, thereby reducing the temperature of the flue gas. Specifically, the high-temperature flue gas discharged from the flue gas discharge port 11 of the rotary kiln combustion furnace 1 enters the waste heat boiler 2 through the first flue gas inlet 21 .
可以理解的是,高温烟气与余热锅炉2进行换热,高温烟气与余热锅炉2中的水换热后能够降低高温烟气的温度,其中降低温度后的高温烟气的温度在300℃-350℃,降温后的高温烟气从余热锅炉2的第一烟气出口22中排出。此外,进而余热锅炉2能够吸收高温烟气的热量,提高了燃料燃烧释放的热量的利用率。It can be understood that the heat exchange between the high-temperature flue gas and the waste heat boiler 2, and the heat exchange between the high-temperature flue gas and the water in the waste heat boiler 2 can reduce the temperature of the high-temperature flue gas, wherein the temperature of the high-temperature flue gas after reducing the temperature is 300°C -350°C, the cooled high-temperature flue gas is discharged from the first flue gas outlet 22 of the waste heat boiler 2 . In addition, the waste heat boiler 2 can absorb the heat of the high-temperature flue gas, thereby improving the utilization rate of the heat released by fuel combustion.
吸收式制冷机组3包括蒸气发生器31和蒸发器32,蒸气发生器31包括第二烟气进口311和第二烟气出口312,蒸发器32包括第三烟气进口321和第三烟气出口322,第一烟气出口22与第二烟气进口311连通,以便将烟气通入蒸气发生器31内,从而降低烟气的温度。The absorption refrigeration unit 3 includes a steam generator 31 and an evaporator 32, the steam generator 31 includes a second flue gas inlet 311 and a second flue gas outlet 312, and the evaporator 32 includes a third flue gas inlet 321 and a third flue gas outlet 322, the first flue gas outlet 22 communicates with the second flue gas inlet 311, so as to pass the flue gas into the steam generator 31, thereby reducing the temperature of the flue gas.
具体地,从余热锅炉2排出的烟气经过蒸气发生器31的第二烟气进口311进入蒸气发生器31中,烟气与蒸气发生器31中的冷却剂进行换热,进而使冷却剂蒸发并吸收烟气的热量,进一步地,经过降温的烟气从蒸气发生器31的第二烟气出口312排出。Specifically, the flue gas discharged from the waste heat boiler 2 enters the steam generator 31 through the second flue gas inlet 311 of the steam generator 31, and the flue gas exchanges heat with the coolant in the steam generator 31, thereby evaporating the coolant. And absorb the heat of the flue gas, and further, the cooled flue gas is discharged from the second flue gas outlet 312 of the steam generator 31 .
脱硫塔4包括第四烟气进口41和第四烟气出口42,第二烟气出口312与第四烟气进口41连通,以便将烟气通入脱硫塔4内,从而对烟气进行脱硫。The desulfurization tower 4 includes a fourth flue gas inlet 41 and a fourth flue gas outlet 42, the second flue gas outlet 312 communicates with the fourth flue gas inlet 41, so that the flue gas is passed into the desulfurization tower 4, thereby desulfurizing the flue gas .
具体地,从蒸气发生器31排出的烟气经过第四烟气进口41进入脱硫塔4中,烟气在脱硫塔4进行脱硫处理,进而去除烟气中的含硫化合物,当烟气经过脱硫处理后,从脱硫塔4的第四烟气出口42排出。Specifically, the flue gas discharged from the steam generator 31 enters the desulfurization tower 4 through the fourth flue gas inlet 41, and the flue gas is desulfurized in the desulfurization tower 4 to remove sulfur-containing compounds in the flue gas. After treatment, it is discharged from the fourth flue gas outlet 42 of the desulfurization tower 4 .
第四烟气出口42与第三烟气进口321连通,以便将烟气通入蒸发器32内,从而降低烟气的温度。具体地,经过脱硫的烟气经脱硫塔4的第四烟气出口42排出,从蒸发器32的第三烟气进口321进入蒸发器32中,使烟气在蒸发器32中与制冷剂进行换热,进而降低了烟气的温度。The fourth flue gas outlet 42 communicates with the third flue gas inlet 321 so as to pass the flue gas into the evaporator 32 to reduce the temperature of the flue gas. Specifically, the desulfurized flue gas is discharged through the fourth flue gas outlet 42 of the desulfurization tower 4, and enters the evaporator 32 from the third flue gas inlet 321 of the evaporator 32, so that the flue gas is separated from the refrigerant in the evaporator 32. heat exchange, thereby reducing the temperature of the flue gas.
脱硫塔内设有熟石灰。具体地,脱硫塔4通过熟石灰与烟气进行反应进而对烟气进行脱硫处理,因此脱硫塔能够去除烟气中的含硫化合物。其中,脱硫塔4对烟气进行脱硫处理包括干法脱硫和半干法脱硫。Slaked lime is arranged in the desulfurization tower. Specifically, the desulfurization tower 4 desulfurizes the flue gas by reacting slaked lime with the flue gas, so the desulfurization tower can remove sulfur-containing compounds in the flue gas. Wherein, the desulfurization treatment of the flue gas by the desulfurization tower 4 includes dry desulfurization and semi-dry desulfurization.
可选的,采用干法脱硫去除烟尘中的含硫化合物,其中干燥的熟石灰作为吸收剂,将脱硫塔4中的烟气与干燥的熟石灰反应,进而去除烟气中的含硫化合物。或者,采用半干法脱硫去除烟尘中的含硫化合物。其中,将熟石灰浆喷洒在脱硫塔4内,使熟石灰浆在脱硫塔4均匀地分布在脱硫塔4内,使烟气与脱硫塔4内的熟石灰反应,进而去除烟气中的含硫化合物。Optionally, dry desulfurization is used to remove sulfur-containing compounds in flue dust, wherein dry slaked lime is used as an absorbent, and the flue gas in the desulfurization tower 4 is reacted with dry slaked lime, thereby removing sulfur-containing compounds in the flue gas. Alternatively, semi-dry desulfurization is used to remove sulfur compounds in the flue dust. Wherein, the slaked lime slurry is sprayed in the desulfurization tower 4, so that the slaked lime slurry is evenly distributed in the desulfurization tower 4, and the flue gas reacts with the slaked lime in the desulfurization tower 4, thereby removing sulfur compounds in the flue gas.
低温吸附塔5包括第五烟气进口51和第五烟气出口52,第三烟气出口322与第五烟气进口51连通,以便将烟气通入低温吸附塔5内,从而对烟气进行脱硫和脱硝。The low-temperature adsorption tower 5 includes the fifth flue gas inlet 51 and the fifth flue gas outlet 52, and the third flue gas outlet 322 communicates with the fifth flue gas inlet 51, so that the flue gas is passed into the low-temperature adsorption tower 5, thereby the flue gas For desulfurization and denitrification.
具体地,经过降温的脱硫烟气经过蒸发器32的第三烟气出口322排出,并且从低温吸附塔5的第五烟气进口51进入低温吸附塔5内,进行脱硫和脱硝处理,将经过脱硫和脱硝处理的烟气从第五烟气出口52排放到外界。Specifically, the desulfurized flue gas that has been cooled is discharged through the third flue gas outlet 322 of the evaporator 32, and enters the low-temperature adsorption tower 5 from the fifth flue gas inlet 51 of the low-temperature adsorption tower 5 for desulfurization and denitration treatment. The desulfurized and denitrified flue gas is discharged to the outside through the fifth flue gas outlet 52 .
本申请实施例的垃圾电厂回转窑燃烧炉烟气低温脱硫脱硝系统通过余热锅炉2和吸收式制冷机组3对烟气降温,使烟气的温度降低,降温后烟气在脱硫塔4进行脱硫处理,经过降温后的烟气的脱硫效率高,因此增大了本申请实施例的垃圾电厂回转窑燃烧炉烟气低温脱硫脱硝系统的脱硫率。经过脱硫塔4脱硫处理后的烟气通过吸收式制冷机组3进行再次降温,降温后的烟气在低温吸附塔5内进行脱硫脱硝处理,经过再次降温后的烟气脱硫和脱硫效率高,因此增大了本申请实施例的垃圾电厂回转窑燃烧炉烟气低温脱硫脱硝系统的脱硝率。The waste heat power plant rotary kiln combustion furnace flue gas low-temperature desulfurization and denitrification system of the embodiment of the present application cools the flue gas through the waste heat boiler 2 and the absorption refrigeration unit 3 to reduce the temperature of the flue gas. After cooling, the flue gas is desulfurized in the desulfurization tower 4 , the desulfurization efficiency of the flue gas after cooling is high, so the desulfurization rate of the low-temperature desulfurization and denitrification system for the flue gas of the rotary kiln combustion furnace of the waste power plant in the embodiment of the present application is increased. The flue gas desulfurized by the desulfurization tower 4 is cooled again by the absorption refrigeration unit 3, and the flue gas after cooling is subjected to desulfurization and denitrification treatment in the low-temperature adsorption tower 5, and the desulfurization and desulfurization efficiency of the flue gas after cooling again is high, so The denitrification rate of the low-temperature desulfurization and denitrification system for the flue gas of the rotary kiln combustion furnace of the waste power plant in the embodiment of the present application is increased.
由此,垃圾电厂回转窑燃烧炉烟气低温脱硫脱硝系统具有脱硫率高和脱硝率高的优点。Therefore, the low-temperature desulfurization and denitrification system for the flue gas of the rotary kiln combustion furnace of the garbage power plant has the advantages of high desulfurization rate and high denitrification rate.
在一些实施例中,如图2所示,本申请实施例的垃圾电厂回转窑燃烧炉烟气低温脱硫脱硝系统还包括冷却塔6,冷却塔6包括第六烟气进口61和第六烟气出口62,第六烟气进口61与第二烟气进口311连通,以便将烟气通入冷却塔6内,从而降低烟气的温度,第六烟气出口62与第四烟气进口41连通,以使第二烟气出口312与第四烟气进口41连通。In some embodiments, as shown in FIG. 2 , the low-temperature desulfurization and denitrification system for the flue gas of the rotary kiln combustion furnace of the waste power plant in the embodiment of the present application further includes a cooling tower 6, and the cooling tower 6 includes a sixth flue gas inlet 61 and a sixth flue gas inlet 61. The outlet 62, the sixth flue gas inlet 61 communicates with the second flue gas inlet 311, so as to pass the flue gas into the cooling tower 6, thereby reducing the temperature of the flue gas, and the sixth flue gas outlet 62 communicates with the fourth flue gas inlet 41 , so that the second flue gas outlet 312 communicates with the fourth flue gas inlet 41 .
具体地,经过蒸气发生器31降温后的烟气从第二烟气进口311排出,通过第六烟气进口61进入冷却塔6内,烟气在冷却塔6内进行降温。烟气经过冷却塔6降温后,经第六烟气出口62排出,通过第四烟气进口41进入脱硫塔4中。Specifically, the flue gas cooled by the steam generator 31 is discharged from the second flue gas inlet 311 , enters the cooling tower 6 through the sixth flue gas inlet 61 , and the flue gas is cooled in the cooling tower 6 . After being cooled by the cooling tower 6 , the flue gas is discharged through the sixth flue gas outlet 62 and enters the desulfurization tower 4 through the fourth flue gas inlet 41 .
可以理解的是,经过蒸气发生器31降温后的烟气在180℃-300℃,而在300℃-500℃之间时,烟气中易生成有害物质二噁英,将经过蒸气发生器31降温后的烟气通入冷却塔6中进行降温,进而抑制了二噁英的产生,因此使排放到外界的烟气中不含有害物质二噁英,达到环保的目的。It can be understood that when the temperature of the flue gas cooled by the steam generator 31 is between 180°C and 300°C, and between 300°C and 500°C, harmful substances such as dioxins are likely to be formed in the flue gas, which will pass through the steam generator 31 The cooled flue gas is passed into the cooling tower 6 for cooling, thereby suppressing the generation of dioxins, so that the flue gas discharged to the outside does not contain harmful substances dioxins, thereby achieving the purpose of environmental protection.
由此,本申请实施例的垃圾电厂回转窑燃烧炉烟气低温脱硫脱硝系统具有环保的优点。Therefore, the low-temperature desulfurization and denitrification system for the flue gas of the rotary kiln combustion furnace of the garbage power plant in the embodiment of the present application has the advantage of environmental protection.
在一些实施例中,如图2所示,本申请实施例的垃圾电厂回转窑燃烧炉烟气低温脱硫脱硝系统还包括除尘器7,除尘器7包括进气口71和出气口72,进气口71与第四烟气出 口42连通,以便将烟气通入除尘器7,出气口72与第三烟气进口321连通,以使第四烟气出口42与第三烟气进口321连通。In some embodiments, as shown in FIG. 2 , the low-temperature desulfurization and denitrification system for the flue gas of the rotary kiln combustion furnace of the waste power plant in the embodiment of the present application further includes a dust collector 7, and the dust collector 7 includes an air inlet 71 and an air outlet 72, and the air inlet The port 71 communicates with the fourth flue gas outlet 42 so as to pass the flue gas into the dust collector 7 , and the gas outlet 72 communicates with the third flue gas inlet 321 so that the fourth flue gas outlet 42 communicates with the third flue gas inlet 321 .
具体地,经过脱硫塔4脱硫处理后的烟气从第四烟气出口42排出,通过除尘器7的进气口71进入除尘器7中,烟气在除尘器7中进行除尘处理,进而去除烟气中的烟尘,使排放到外界的烟气中没有烟尘,进而达到环保的目的。Specifically, the flue gas desulfurized by the desulfurization tower 4 is discharged from the fourth flue gas outlet 42, enters the dust collector 7 through the air inlet 71 of the dust collector 7, and the flue gas is subjected to dust removal treatment in the dust collector 7, and then removed The soot in the flue gas makes the flue gas discharged to the outside without soot, and then achieves the purpose of environmental protection.
进一步地,除尘器7具有出尘口73,将经过除尘器7过滤出的烟尘通过出尘口73排出,进而对过滤出的烟尘进行回收处理,避免对环境造成二次污染。Further, the dust collector 7 has a dust outlet 73, through which the smoke and dust filtered by the dust collector 7 are discharged, and then the filtered smoke and dust are recycled to avoid secondary pollution to the environment.
由此,本申请实施例的垃圾电厂回转窑燃烧炉烟气低温脱硫脱硝系统具有环保的优点。Therefore, the low-temperature desulfurization and denitrification system for the flue gas of the rotary kiln combustion furnace of the garbage power plant in the embodiment of the present application has the advantage of environmental protection.
在一些实施例中,如图2所示,本申请实施例的垃圾电厂回转窑燃烧炉烟气低温脱硫脱硝系统还包括预冷器9,预冷器9包括第七烟气进口911和第七烟气出口912,第七烟气进口911与出气口72连通,以便将烟气通入预冷器9内,从而降低烟气的温度。第七烟气出口912与第三烟气进口321连通,以使出气口72与第三烟气进口321连通。In some embodiments, as shown in Figure 2, the low-temperature desulfurization and denitrification system for flue gas from the rotary kiln combustion furnace of the waste power plant in the embodiment of the present application further includes a precooler 9, and the precooler 9 includes a seventh flue gas inlet 911 and a seventh flue gas inlet 911. The flue gas outlet 912 and the seventh flue gas inlet 911 communicate with the gas outlet 72 so as to pass the flue gas into the precooler 9 to reduce the temperature of the flue gas. The seventh flue gas outlet 912 communicates with the third flue gas inlet 321 , so that the gas outlet 72 communicates with the third flue gas inlet 321 .
具体地,经除尘器7除尘后的烟气从除尘器7的出气口72排出,通过预冷器9的第七烟气进口911进入预冷器9中,烟气在预冷器9中进行降温处理,经过降温后的烟气通过第七烟气出口912排出,并通过第三烟气进口321进入蒸发器32中。Specifically, the flue gas dedusted by the dust collector 7 is discharged from the gas outlet 72 of the dust collector 7, enters the precooler 9 through the seventh flue gas inlet 911 of the precooler 9, and the flue gas is cooled in the precooler 9. In the cooling process, the cooled flue gas is discharged through the seventh flue gas outlet 912 and enters the evaporator 32 through the third flue gas inlet 321 .
进一步地,预冷器9包括第一换热组件91和第二换热组件92,第一换热组件91包括第七烟气进口911和第七烟气出口912,第二换热组件92能够通入低温流体,第七烟气进口911与出气口72连通,以便将烟气通入第一换热组件91内,从而降低烟气的温度。Further, the precooler 9 includes a first heat exchange assembly 91 and a second heat exchange assembly 92, the first heat exchange assembly 91 includes a seventh flue gas inlet 911 and a seventh flue gas outlet 912, and the second heat exchange assembly 92 can The low-temperature fluid is passed through, and the seventh flue gas inlet 911 communicates with the gas outlet 72, so as to pass the flue gas into the first heat exchange component 91, thereby reducing the temperature of the flue gas.
具体地,经除尘器7除尘后的烟气通过第七烟气进口911进入第一换热组件91中,在第一换热组件91中的烟气与第二换热组件92中的低温流体进行换热,进而使第一换热组件91中的烟气的温度降低。经过降温后的烟气通过第一换热组件91的第七烟气出口912排出,并经第三烟气进口321进入蒸发器32中进行再次降温。Specifically, the flue gas dedusted by the dust collector 7 enters the first heat exchange assembly 91 through the seventh flue gas inlet 911, and the flue gas in the first heat exchange assembly 91 and the low-temperature fluid in the second heat exchange assembly 92 Heat exchange is performed, thereby reducing the temperature of the flue gas in the first heat exchange assembly 91 . The cooled flue gas is discharged through the seventh flue gas outlet 912 of the first heat exchange component 91 , and enters the evaporator 32 through the third flue gas inlet 321 to be cooled again.
进一步的,第二换热组件92具有第八烟气进口921和第八烟气出口922,第八烟气进口921与第五烟气出口52连通,以便烟气通入第二换热组件92,以使烟气形成低温流体。Further, the second heat exchanging assembly 92 has an eighth flue gas inlet 921 and an eighth flue gas outlet 922, and the eighth flue gas inlet 921 communicates with the fifth flue gas outlet 52, so that the flue gas passes into the second heat exchanging assembly 92 , so that the flue gas forms a low-temperature fluid.
具体地,经过低温吸附塔5进行脱硫和脱硝处理后的烟气经第五烟气出口52排出,通过第二换热组件92的第八烟气进口921进入第二换热组件92内。可以理解的是,低温吸附塔5中的烟气经过蒸发器32的再次降温,进而低温吸附塔5排出的烟气的温度低于第一换热组件91内的烟气,因此从低温吸附塔5排出的烟气形成低温流体,并且该烟气形成的低温流体在第二换热组件92内与第一换热组件91的烟气进行换热,进而降低第一换热组件91的烟气的温度。由此,本申请实施例的垃圾电厂回转窑燃烧炉烟气低温脱硫脱硝系统具有节能的优点。Specifically, the flue gas desulfurized and denitrified by the low-temperature adsorption tower 5 is discharged through the fifth flue gas outlet 52 , and enters the second heat exchange assembly 92 through the eighth flue gas inlet 921 of the second heat exchange assembly 92 . It can be understood that the flue gas in the cryogenic adsorption tower 5 is cooled again through the evaporator 32, and then the temperature of the flue gas discharged from the cryogenic adsorption tower 5 is lower than that of the flue gas in the first heat exchange assembly 91. 5 The exhausted flue gas forms a low-temperature fluid, and the low-temperature fluid formed by the flue gas exchanges heat with the flue gas of the first heat exchange component 91 in the second heat exchange component 92, thereby reducing the temperature of the flue gas in the first heat exchange component 91. temperature. Therefore, the low-temperature desulfurization and denitrification system for the flue gas of the rotary kiln combustion furnace of the garbage power plant in the embodiment of the present application has the advantage of saving energy.
在一些实施例中,如图2所示,本申请实施例的垃圾电厂回转窑燃烧炉烟气低温脱硫 脱硝系统还包括引风机8,引风机8设在预冷器9和除尘器7之间,引风机8的进风口与出气口72连通,引风机8的出风口与第七烟气进口911连通,从而使第七烟气进口911与出气口72连通。In some embodiments, as shown in FIG. 2 , the low-temperature desulfurization and denitrification system for the flue gas of the rotary kiln combustion furnace of the waste power plant in the embodiment of the present application further includes an induced draft fan 8, and the induced draft fan 8 is arranged between the precooler 9 and the dust collector 7 , the air inlet of the induced draft fan 8 communicates with the air outlet 72 , and the air outlet of the induced draft fan 8 communicates with the seventh flue gas inlet 911 , so that the seventh flue gas inlet 911 communicates with the air outlet 72 .
具体地,引风机8具有第九烟气进口81和第九烟气出口82,其中第九烟气进口81为引风机8的进风口,第九烟气出口82为引风机8的出风口。具体地,引风机8的第九烟气进口81与除尘器7出气口72连通,引风机8的第九烟气出口82与预冷器9的第七烟气进口911连通。Specifically, the induced draft fan 8 has a ninth flue gas inlet 81 and a ninth flue gas outlet 82 , wherein the ninth flue gas inlet 81 is the air inlet of the induced draft fan 8 , and the ninth flue gas outlet 82 is the air outlet of the induced draft fan 8 . Specifically, the ninth flue gas inlet 81 of the induced draft fan 8 communicates with the gas outlet 72 of the dust collector 7 , and the ninth flue gas outlet 82 of the induced draft fan 8 communicates with the seventh flue gas inlet 911 of the precooler 9 .
可以理解的是,引风机8能够加快烟气的流动速度,进而增大本申请实施例的垃圾电厂回转窑燃烧炉烟气低温脱硫脱硝系统中烟气的处理效率。It can be understood that the induced draft fan 8 can increase the flow velocity of the flue gas, thereby increasing the flue gas treatment efficiency in the low-temperature desulfurization and denitrification system for the flue gas of the rotary kiln combustion furnace of the waste power plant according to the embodiment of the present application.
在一些实施例中,本申请实施例的垃圾电厂回转窑燃烧炉烟气低温脱硫脱硝系统还包括烟筒,烟筒与第五烟气出口52或第八烟气出口922,以便排放烟气。具体地,烟筒与低温吸附塔5第五烟气出口52的连通,进而使从低温吸附塔5排出的烟气通过烟筒排出。或者,烟筒与预冷器9的第八烟气出口922连通,进而使从预冷器9排出的烟气通过烟筒排出。In some embodiments, the low-temperature desulfurization and denitrification system for flue gas from the rotary kiln combustion furnace of the garbage power plant in the embodiment of the present application further includes a chimney, the chimney and the fifth flue gas outlet 52 or the eighth flue gas outlet 922 for discharging flue gas. Specifically, the chimney communicates with the fifth flue gas outlet 52 of the low-temperature adsorption tower 5, so that the flue gas discharged from the low-temperature adsorption tower 5 is discharged through the chimney. Alternatively, the chimney communicates with the eighth flue gas outlet 922 of the precooler 9, so that the flue gas discharged from the precooler 9 is discharged through the chimney.
在一些实施例中,余热锅炉2包括烟气管道,烟气管道包括第一烟气进口21和第一烟气出口22,烟气管道用于加热余热锅炉2。具体地,回转窑燃烧炉1排出的高温烟气从烟气管道的第一烟气进口21进入烟气管道内,高温烟气在烟气管道内与余热锅炉2进行换热,进而降低高温烟气的温度。In some embodiments, the waste heat boiler 2 includes a flue gas pipeline, the flue gas pipeline includes a first flue gas inlet 21 and a first flue gas outlet 22 , and the flue gas pipeline is used for heating the waste heat boiler 2 . Specifically, the high-temperature flue gas discharged from the rotary kiln combustion furnace 1 enters the flue gas pipe from the first flue gas inlet 21 of the flue gas pipe, and the high-temperature flue gas exchanges heat with the waste heat boiler 2 in the flue gas pipe, thereby reducing the temperature of the high-temperature flue gas. air temperature.
本申请的描述中,需要理解的是,术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”“内”、“外”、“顺时针”、“逆时针”、“轴向”、“径向”、“周向”等指示的方位或位置关系为基于附图所示的方位或位置关系,仅是为了便于描述本申请和简化描述,而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作,因此不能理解为对本申请的限制。In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear" ", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial", " The orientation or positional relationship indicated by "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the application and simplifying the description, rather than indicating or implying that the referred device or element must Having a particular orientation, being constructed and operating in a particular orientation, and therefore not to be construed as limiting the application.
此外,术语“第一”、“第二”仅用于描述目的,而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此,限定有“第一”、“第二”的特征可以明示或者隐含地包括至少一个该特征。在本申请的描述中,“多个”的含义是至少两个,例如两个,三个等,除非另有明确具体的限定。In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present application, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.
在本申请中,除非另有明确的规定和限定,术语“安装”、“相连”、“连接”、“固定”等术语应做广义理解,例如,可以是固定连接,也可以是可拆卸连接,或成一体;可以是机械连接,也可以是电连接或彼此可通讯;可以是直接相连,也可以通过中间媒介间接相 连,可以是两个元件内部的连通或两个元件的相互作用关系,除非另有明确的限定。对于本领域的普通技术人员而言,可以根据具体情况理解上述术语在本申请中的具体含义。In this application, terms such as "installation", "connection", "connection" and "fixation" should be interpreted in a broad sense, for example, it can be a fixed connection or a detachable connection, unless otherwise clearly specified and limited. , or integrated; can be mechanically connected, can also be electrically connected or can communicate with each other; can be directly connected, can also be indirectly connected through an intermediary, can be the internal communication of two components or the interaction relationship between two components, Unless expressly defined otherwise. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application according to specific situations.
在本申请中,除非另有明确的规定和限定,第一特征在第二特征“上”或“下”可以是第一和第二特征直接接触,或第一和第二特征通过中间媒介间接接触。而且,第一特征在第二特征“之上”、“上方”和“上面”可是第一特征在第二特征正上方或斜上方,或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”可以是第一特征在第二特征正下方或斜下方,或仅仅表示第一特征水平高度小于第二特征。In the present application, unless otherwise clearly specified and limited, a first feature being "on" or "under" a second feature may mean that the first and second features are in direct contact, or that the first and second features are indirect through an intermediary. touch. Moreover, "above", "above" and "above" the first feature on the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. "Below", "beneath" and "beneath" the first feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is less horizontally than the second feature.
在本申请中,术语“一个实施例”、“一些实施例”、“示例”、“具体示例”、或“一些示例”等意指结合该实施例或示例描述的具体特征、结构、材料或者特点包含于本申请的至少一个实施例或示例中。在本说明书中,对上述术语的示意性表述不必须针对的是相同的实施例或示例。而且,描述的具体特征、结构、材料或者特点可以在任一个或多个实施例或示例中以合适的方式结合。此外,在不相互矛盾的情况下,本领域的技术人员可以将本说明书中描述的不同实施例或示例以及不同实施例或示例的特征进行结合和组合。In this application, the terms "one embodiment," "some embodiments," "example," "specific examples," or "some examples" mean specific features, structures, materials, or features described in connection with the embodiment or examples. Features are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the described specific features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples and features of different embodiments or examples described in this specification without conflicting with each other.
尽管上面已经示出和描述了本申请的实施例,可以理解的是,上述实施例是示例性的,不能理解为对本申请的限制,本领域的普通技术人员在本申请的范围内可以对上述实施例进行变化、修改、替换和变型。Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limitations on the present application, and those skilled in the art can make the above-mentioned The embodiments are subject to changes, modifications, substitutions and variations.

Claims (9)

  1. 一种垃圾电厂回转窑燃烧炉烟气低温脱硫脱硝系统,其特征在于,包括:A low-temperature desulfurization and denitrification system for flue gas from a rotary kiln combustion furnace in a waste power plant, characterized in that it includes:
    回转窑燃烧炉,所述回转窑燃烧炉包括烟气排放口;A rotary kiln combustion furnace, the rotary kiln combustion furnace includes a flue gas discharge port;
    余热锅炉,所述余热锅炉包括第一烟气进口和第一烟气出口,所述烟气排放口与所述第一烟气进口连通,以便将烟气通入所述余热锅炉内,以使所述烟气加热所述余热锅炉,从而降低所述烟气的温度;A waste heat boiler, the waste heat boiler includes a first flue gas inlet and a first flue gas outlet, and the flue gas discharge port communicates with the first flue gas inlet so as to pass flue gas into the waste heat boiler so that The flue gas heats the waste heat boiler, thereby reducing the temperature of the flue gas;
    吸收式制冷机组,所述吸收式制冷机组包括蒸气发生器和蒸发器,所述蒸气发生器包括第二烟气进口和第二烟气出口,所述蒸发器包括第三烟气进口和第三烟气出口,所述第一烟气出口与所述第二烟气进口连通,以便将所述烟气通入所述蒸气发生器内,从而降低所述烟气的温度;An absorption refrigerating unit, the absorption refrigerating unit includes a steam generator and an evaporator, the steam generator includes a second flue gas inlet and a second flue gas outlet, and the evaporator includes a third flue gas inlet and a third a flue gas outlet, the first flue gas outlet communicates with the second flue gas inlet, so as to pass the flue gas into the steam generator, thereby reducing the temperature of the flue gas;
    脱硫塔,所述脱硫塔内设有用于脱硫的熟石灰,所述脱硫塔包括第四烟气进口和第四烟气出口,所述第二烟气出口与所述第四烟气进口连通,以便将所述烟气通入所述脱硫塔内,从而对所述烟气进行脱硫,A desulfurization tower, the desulfurization tower is provided with slaked lime for desulfurization, the desulfurization tower includes a fourth flue gas inlet and a fourth flue gas outlet, and the second flue gas outlet communicates with the fourth flue gas inlet, so that passing the flue gas into the desulfurization tower to desulfurize the flue gas,
    第四烟气出口与所述第三烟气进口连通,以便将所述烟气通入所述蒸发器内,从而降低所述烟气的温度;The fourth flue gas outlet communicates with the third flue gas inlet, so as to pass the flue gas into the evaporator, thereby reducing the temperature of the flue gas;
    低温吸附塔,所述低温吸附塔包括第五烟气进口和第五烟气出口,所述第三烟气出口与所述第五烟气进口连通,以便将所述烟气通入所述低温吸附塔内,从而对所述烟气进行脱硫、脱硝。A low-temperature adsorption tower, the low-temperature adsorption tower includes a fifth flue gas inlet and a fifth flue gas outlet, and the third flue gas outlet communicates with the fifth flue gas inlet so that the flue gas can be passed into the low-temperature In the adsorption tower, the flue gas is desulfurized and denitrified.
  2. 根据权利要求1所述的垃圾电厂回转窑燃烧炉烟气低温脱硫脱硝系统,其特征在于,还包括冷却塔,所述冷却塔包括第六烟气进口和第六烟气出口,所述第六烟气进口与所述第二烟气进口连通,以便将所述烟气通入所述冷却塔内,从而降低所述烟气的温度,The low-temperature desulfurization and denitrification system for the flue gas of the rotary kiln combustion furnace of the garbage power plant according to claim 1 is characterized in that it also includes a cooling tower, the cooling tower includes a sixth flue gas inlet and a sixth flue gas outlet, and the sixth The flue gas inlet communicates with the second flue gas inlet, so that the flue gas is passed into the cooling tower, thereby reducing the temperature of the flue gas,
    所述第六烟气出口与所述第四烟气进口连通,以使所述第二烟气出口与所述第四烟气进口连通。The sixth flue gas outlet communicates with the fourth flue gas inlet, so that the second flue gas outlet communicates with the fourth flue gas inlet.
  3. 根据权利要求1或2所述的垃圾电厂回转窑燃烧炉烟气低温脱硫脱硝系统,其特征在于,还包括除尘器,所述除尘器包括进气口和出气口,所述进气口与所述第四烟气出口连通,以便将所述烟气通入所述除尘器,According to claim 1 or 2, the low-temperature desulfurization and denitrification system for the flue gas of the rotary kiln combustion furnace of the garbage power plant is characterized in that it also includes a dust collector, and the dust collector includes an air inlet and an air outlet, and the air inlet is connected to the air outlet. The fourth flue gas outlet is communicated so that the flue gas is passed into the dust collector,
    所述出气口与所述第三烟气进口连通,以使第四烟气出口与所述第三烟气进口连通。The gas outlet communicates with the third flue gas inlet, so that the fourth flue gas outlet communicates with the third flue gas inlet.
  4. 根据权利要求3所述的垃圾电厂回转窑燃烧炉烟气低温脱硫脱硝系统,其特征在于,还包括预冷器,所述预冷器包括第七烟气进口和第七烟气出口,所述第七烟气进口与所述出气口连通,以便将所述烟气通入所述预冷器内,从而降低所述烟气的温度;According to claim 3, the low-temperature desulfurization and denitrification system for the flue gas of the rotary kiln combustion furnace of the garbage power plant is characterized in that it also includes a precooler, and the precooler includes a seventh flue gas inlet and a seventh flue gas outlet. The seventh flue gas inlet communicates with the gas outlet, so as to pass the flue gas into the precooler, thereby reducing the temperature of the flue gas;
    所述第七烟气出口与所述第三烟气进口连通,以使所述出气口与所述第三烟气进口连 通。The seventh flue gas outlet communicates with the third flue gas inlet, so that the gas outlet communicates with the third flue gas inlet.
  5. 根据权利要求4所述的垃圾电厂回转窑燃烧炉烟气低温脱硫脱硝系统,其特征在于,所述预冷器包括第一换热组件和第二换热组件,所述第一换热组件包括所述第七烟气进口和所述第七烟气出口,所述第二换热组件能够通入低温流体,所述第七烟气进口与所述出气口连通,以便将所述烟气通入所述第一换热组件内,从而降低所述烟气的温度。The low-temperature desulfurization and denitrification system for the flue gas of the rotary kiln combustion furnace of the garbage power plant according to claim 4, wherein the precooler includes a first heat exchange assembly and a second heat exchange assembly, and the first heat exchange assembly includes The seventh flue gas inlet and the seventh flue gas outlet, the second heat exchange component can be fed with low-temperature fluid, and the seventh flue gas inlet communicates with the gas outlet so as to pass the flue gas into the first heat exchange component, thereby reducing the temperature of the flue gas.
  6. 根据权利要求5所述的垃圾电厂回转窑燃烧炉烟气低温脱硫脱硝系统,其特征在于,所述第二换热组件具有第八烟气进口和第八烟气出口,所述第八烟气进口与所述第五烟气出口连通,以便所述烟气通入所述第二换热组件,以使所述烟气形成所述低温流体。The low-temperature desulfurization and denitrification system for flue gas from a rotary kiln combustion furnace in a garbage power plant according to claim 5, wherein the second heat exchange component has an eighth flue gas inlet and an eighth flue gas outlet, and the eighth flue gas The inlet communicates with the fifth flue gas outlet, so that the flue gas passes into the second heat exchange component, so that the flue gas forms the low-temperature fluid.
  7. 根据权利要求5所述的垃圾电厂回转窑燃烧炉烟气低温脱硫脱硝系统,其特征在于,还包括引风机,所述引风机设在所述预冷器和所述除尘器之间,所述引风机的进风口与所述出气口连通,所述引风机的出风口与所述第七烟气进口连通,从而使所述第七烟气进口与所述出气口连通。According to claim 5, the low-temperature desulfurization and denitrification system for the flue gas of the rotary kiln combustion furnace of the garbage power plant is characterized in that it also includes an induced draft fan, and the induced draft fan is arranged between the precooler and the dust collector. The air inlet of the induced fan communicates with the air outlet, and the air outlet of the induced fan communicates with the seventh flue gas inlet, so that the seventh flue gas inlet communicates with the air outlet.
  8. 根据权利要求6所述的垃圾电厂回转窑燃烧炉烟气低温脱硫脱硝系统,其特征在于,还包括烟筒,所述烟筒与所述第五烟气出口或所述第八烟气出口连通,以便排放所述烟气。The low-temperature desulfurization and denitrification system for the flue gas of the rotary kiln combustion furnace of the garbage power plant according to claim 6, further comprising a chimney, and the chimney communicates with the fifth flue gas outlet or the eighth flue gas outlet, so that Exhaust the fumes.
  9. 根据权利要求1-8中任一项所述的垃圾电厂回转窑燃烧炉烟气低温脱硫脱硝系统,其特征在于,所述余热锅炉包括烟气管道,所述烟气管道包括所述第一烟气进口和所述第一烟气出口,所述烟气管道用于加热所述余热锅炉。According to any one of claims 1-8, the low-temperature desulfurization and denitrification system for the flue gas of the rotary kiln combustion furnace of the garbage power plant is characterized in that the waste heat boiler includes a flue gas pipeline, and the flue gas pipeline includes the first flue gas gas inlet and the first flue gas outlet, and the flue gas pipeline is used to heat the waste heat boiler.
PCT/CN2022/099162 2021-09-28 2022-06-16 Flue gas low-temperature desulfurization and denitrification system for rotary kiln combustion furnace of garbage power plant WO2023050897A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202122371166.2 2021-09-28
CN202122371166.2U CN216557146U (en) 2021-09-28 2021-09-28 Low-temperature flue gas desulfurization and denitrification system of rotary kiln combustion furnace of garbage power plant

Publications (1)

Publication Number Publication Date
WO2023050897A1 true WO2023050897A1 (en) 2023-04-06

Family

ID=81566006

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2022/099162 WO2023050897A1 (en) 2021-09-28 2022-06-16 Flue gas low-temperature desulfurization and denitrification system for rotary kiln combustion furnace of garbage power plant

Country Status (2)

Country Link
CN (1) CN216557146U (en)
WO (1) WO2023050897A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113769569A (en) * 2021-09-28 2021-12-10 中国华能集团清洁能源技术研究院有限公司 Low-temperature desulfurization and denitrification method and system for flue gas of rotary kiln combustion furnace of garbage power plant
CN216557146U (en) * 2021-09-28 2022-05-17 中国华能集团清洁能源技术研究院有限公司 Low-temperature flue gas desulfurization and denitrification system of rotary kiln combustion furnace of garbage power plant

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3777623B2 (en) * 1994-12-05 2006-05-24 石川島播磨重工業株式会社 Gas processing equipment
CN105854571A (en) * 2016-06-21 2016-08-17 南通天蓝环保能源成套设备有限公司 Novel medical waste incineration flue gas purification system
US20170203252A1 (en) * 2016-01-14 2017-07-20 Fluor Technologies Corporation Systems and methods for treatment of flue gas
CN108939901A (en) * 2017-05-27 2018-12-07 钢研晟华工程技术有限公司 A kind of sintering flue gas desulfurization denitrification apparatus and method
CN110743312A (en) * 2019-10-29 2020-02-04 中国华能集团有限公司 Flue gas low-temperature adsorption denitration system and process
CN111495112A (en) * 2020-05-18 2020-08-07 中国华能集团有限公司 Low temperature removes integration of bed and adsorbs SOx/NOx control system
CN112268293A (en) * 2020-11-11 2021-01-26 西安热工研究院有限公司 Large-scale thermal power generating unit flue gas active coke purification system and method
CN112275104A (en) * 2020-10-16 2021-01-29 北京中航泰达环保科技股份有限公司 Flue gas waste heat comprehensive utilization system of coke oven flue gas semi-dry process technology
CN216557146U (en) * 2021-09-28 2022-05-17 中国华能集团清洁能源技术研究院有限公司 Low-temperature flue gas desulfurization and denitrification system of rotary kiln combustion furnace of garbage power plant

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3777623B2 (en) * 1994-12-05 2006-05-24 石川島播磨重工業株式会社 Gas processing equipment
US20170203252A1 (en) * 2016-01-14 2017-07-20 Fluor Technologies Corporation Systems and methods for treatment of flue gas
CN105854571A (en) * 2016-06-21 2016-08-17 南通天蓝环保能源成套设备有限公司 Novel medical waste incineration flue gas purification system
CN108939901A (en) * 2017-05-27 2018-12-07 钢研晟华工程技术有限公司 A kind of sintering flue gas desulfurization denitrification apparatus and method
CN110743312A (en) * 2019-10-29 2020-02-04 中国华能集团有限公司 Flue gas low-temperature adsorption denitration system and process
CN111495112A (en) * 2020-05-18 2020-08-07 中国华能集团有限公司 Low temperature removes integration of bed and adsorbs SOx/NOx control system
CN112275104A (en) * 2020-10-16 2021-01-29 北京中航泰达环保科技股份有限公司 Flue gas waste heat comprehensive utilization system of coke oven flue gas semi-dry process technology
CN112268293A (en) * 2020-11-11 2021-01-26 西安热工研究院有限公司 Large-scale thermal power generating unit flue gas active coke purification system and method
CN216557146U (en) * 2021-09-28 2022-05-17 中国华能集团清洁能源技术研究院有限公司 Low-temperature flue gas desulfurization and denitrification system of rotary kiln combustion furnace of garbage power plant

Also Published As

Publication number Publication date
CN216557146U (en) 2022-05-17

Similar Documents

Publication Publication Date Title
WO2023050897A1 (en) Flue gas low-temperature desulfurization and denitrification system for rotary kiln combustion furnace of garbage power plant
JP6334402B2 (en) Dry adsorbent input during steady state in dry scrubber
CN105944564A (en) Coke oven flue gas waste heat recycling, desulfuration and denitration integrated system and method
WO2023050702A1 (en) Low-temperature desulfurization and denitrification method and system for flue gas from rotary kiln combustion furnace of refuse incineration power plant
CN110917843A (en) Waste incineration energy-saving flue gas ultralow purification system
CN105597501B (en) A kind of method of exhuast gas desulfurization, denitration in carbon black process
CN105214478A (en) The integral process of a kind of coke oven flue exhuast gas desulfurization denitration and waste heat recovery
TW201231147A (en) Exhaust gas treatment method and apparatus
CN106524771A (en) Technical method for denitration of sintering flue gas
WO2021088526A1 (en) Flue gas multi-pollutant synergistic purification process and apparatus
WO2023050943A1 (en) Low-temperature desulfurization and denitration system for flue gas of cement plant
WO2023050701A1 (en) Low-temperature desulfurization and denitrification method and system for flue gas from coking plant
WO2023050700A1 (en) Low-temperature desulfurization and denitrification method and system for flue gas of cement plant
WO2023050894A1 (en) Low-temperature desulfurization and denitrification system for coking plant flue gas
WO2023050699A1 (en) Low-temperature desulfurization and denitrification method and system for flue gas from biomass power plant
CN109482049A (en) A kind of coke oven flue gas dry desulfurization denitration purification integral process
CN108392956A (en) A kind of system for desulfuration and denitration and method for coke oven flue gas
CN110496527A (en) A kind of method of coke oven flue exhuast gas desulfurization denitration
CN108190986A (en) A kind of flue is classified pre- thermal evaporation desulfurization wastewater Zero discharging system and its method of work
CN107551778A (en) A kind of denitrating flue gas desulfurization dust-removing technique method
WO2023050896A1 (en) Low-temperature desulfurization and denitrification system for flue gas of biomass power plant
CN111495186A (en) Flue gas heat exchange heating desulfurization and denitrification system of hot rolled steel heat accumulating type heating furnace
CN208583169U (en) A kind of sintering flue gas desulfurization denitration, flue gas disappear white total system
CN108704464A (en) A kind of sintering flue gas desulfurization denitration, flue gas disappear white total system and technique
CN214287485U (en) Calcium-carbon method flue gas desulfurization and denitrification device

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 22874294

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE