WO2020140337A1 - Incinérateur de déchets à haute pression, à température élevée - Google Patents

Incinérateur de déchets à haute pression, à température élevée Download PDF

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Publication number
WO2020140337A1
WO2020140337A1 PCT/CN2019/080033 CN2019080033W WO2020140337A1 WO 2020140337 A1 WO2020140337 A1 WO 2020140337A1 CN 2019080033 W CN2019080033 W CN 2019080033W WO 2020140337 A1 WO2020140337 A1 WO 2020140337A1
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Prior art keywords
temperature
channel
superheater
boiler
channels
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PCT/CN2019/080033
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English (en)
Chinese (zh)
Inventor
谢军
邓昌梅
黄兵
张心成
郑江龙
陈枫
郭孝武
瞿兆舟
张利军
王高尚
Original Assignee
上海康恒环境股份有限公司
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Priority claimed from CN201811644026.4A external-priority patent/CN110186047A/zh
Priority claimed from CN201811646221.0A external-priority patent/CN110006043A/zh
Priority claimed from CN201811646698.9A external-priority patent/CN110360569A/zh
Priority claimed from CN201811648561.7A external-priority patent/CN110220198A/zh
Application filed by 上海康恒环境股份有限公司 filed Critical 上海康恒环境股份有限公司
Publication of WO2020140337A1 publication Critical patent/WO2020140337A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B31/00—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus
    • F22B31/08—Installation of heat-exchange apparatus or of means in boilers for heating air supplied for combustion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22G—SUPERHEATING OF STEAM
    • F22G3/00—Steam superheaters characterised by constructional features; Details of component parts thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/44—Details; Accessories
    • F23G5/46—Recuperation of heat
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/44—Details; Accessories
    • F23G5/48—Preventing corrosion

Definitions

  • the invention relates to the field of municipal solid waste incineration, in particular to a waste incineration boiler with a main steam temperature of 540°C and a main steam pressure of 9.8 MPa.
  • nickel-based or titanium-based surfacing anticorrosion processes are used, and when the main steam temperature exceeds 500 °C, the nickel-based and titanium-based surfacing layers will also corrode rapidly.
  • the invention is a garbage incineration vertical boiler with a main steam temperature of 540°C and a main steam pressure of 9.8MPa, which can increase the thermal efficiency of the turbo-generator set to more than 34%, and at the same time lay special high thermal conductivity castable or plastic insulation
  • the pipe is in direct contact with the flue gas, thereby effectively solving the problem of high temperature corrosion and ensuring the long-term safe and stable operation of the water-cooled wall and the superheater.
  • the purpose of the present invention is to overcome the defects of the prior art.
  • the specific technical solution of the present invention is:
  • a high-temperature and high-pressure waste incineration boiler with a main steam temperature of 540°C and a main steam pressure of 9.8 MPa A water-cooled combustion chamber is used, followed by a channel, a two-channel connection channel, a two-channel, and a three-channel in order of flue gas flow direction. Among them, the screen superheater is arranged on the upper part of the second channel.
  • combustion chamber adopts a fully water-cooled structure, refractory bricks are used in the area in contact with the garbage, the other areas are laid with high thermal conductivity silicon carbide castables, and one channel is entirely laid with high thermal conductivity silicon carbide castables, without using nickel-based anticorrosive coatings.
  • the screen-type superheater is made of TP347H, and the exterior is laid with high thermal conductivity plastic, which is arranged on the upper part of the two channels.
  • the front wall of the two-channel adopts nickel-based anti-corrosion coating, and the top of the two channels, the left and right walls of the screen-type superheater area, and the back wall are laid with high thermal conductivity refractory castable.
  • a three-layer furnace soot blower is arranged on the front wall of the second channel for dust cleaning, and a SNCR spray gun is arranged on the front wall and the left and right walls of the lower part of the second channel.
  • the lower part of the three channels is provided with a serpentine tube type evaporation protector I, which adopts a large lateral pitch and uses a steam soot blower for cleaning.
  • the three-channel arrangement of the upper and lower header type evaporation protector II adopts a large horizontal pitch and a steam soot blower.
  • the high-temperature superheater, the middle-temperature superheater, and the low-temperature superheater adopt a serpentine tube structure, a large lateral pitch, and a steam soot blower.
  • the economizer adopts a serpentine tube structure, a shock wave soot blower, and a siphonic hydrophobic device.
  • a trace water spray desuperheater is provided between the screen superheater and the high temperature superheater, and a secondary water spray desuperheater and a primary water spray desuperheater are respectively provided between the high temperature superheater, the intermediate temperature superheater and the low temperature superheater .
  • the flue gas recirculation process is used.
  • the flue gas recirculation and secondary air share nozzles which are arranged in the front and rear arch areas of the combustion chamber.
  • the invention also provides a high-temperature and high-pressure garbage incineration vertical boiler with a main steam temperature of 540°C and a main steam pressure of 9.8 MPa, which is a vertical suspension structure; it includes a water-cooled combustion chamber and presses flue gas
  • the flow direction is one channel, one two channel connection channel, two channel, three channel and four channel in sequence.
  • the screen superheater is arranged on the upper part of the two channels, the evaporation protector I, the evaporation protector II, the high temperature superheater, the middle temperature superheater, and the low temperature superheater are arranged in sequence in the three channels, and the economizer is arranged on the four channels; Water-cooled structure, refractory bricks are used in the area in contact with garbage, and the other areas are laid with high thermal conductivity silicon carbide castables, one channel is laid with high thermal conductivity silicon carbide castables, and no nickel-based anticorrosive coating is used; the screen superheater is made of TP347H , High-conductivity plastics are laid externally and are arranged on the upper part of the second channel; the front wall of the second channel adopts nickel-based anti-corrosion coating; the top of the second channel and the left and right walls of the screen superheater area and the rear wall are laid with high thermal conductivity refractory castable;
  • the lower front wall and the left and right walls of the second channel are equipped with SNCR spray guns; the lower part of the three channels is provided with a serpentine tube type evaporation protector I, which adopts a large horizontal pitch. At the same time, a steam soot blower is used for cleaning; the three-channel arrangement of the upper and lower header type evaporation protector II adopts a large horizontal pitch and a steam soot blower.
  • the high-temperature superheater, the middle-temperature superheater, and the low-temperature superheater have a serpentine tube structure, a large lateral pitch, and a steam soot blower.
  • the economizer adopts a serpentine tube structure, a shock wave soot blower, and a siphonic drain device is also provided.
  • a micro water spray desuperheater is provided between the screen superheater and the high temperature superheater, and a secondary water spray desuperheater and a primary water spray are respectively provided between the high temperature superheater, the intermediate temperature superheater and the low temperature superheater Desuperheater.
  • the invention also provides a high temperature and high pressure garbage incineration horizontal boiler, a garbage incineration horizontal boiler with a main steam pressure of 9.8 MPa, the main steam temperature of the garbage incineration boiler is 540 °C, a horizontal suspension structure, and water cooling combustion Chamber; one channel, one two channel connection channel, two channel, three channel and horizontal channel according to the direction of flue gas flow; the screen superheater is arranged on the upper part of the two channels, the outside is laid with special high thermal conductivity plastic, evaporation protector I Arranged in the lower part of the three channels, the evaporation protector II, high temperature superheater, medium temperature superheater, low temperature superheater and economizer are arranged in order in the horizontal channel.
  • the water-cooled combustion chamber 4 is composed of a membrane-type water-cooled wall around the grate, a refractory brick is laid in the area in contact with the garbage, and a high thermal conductivity silicon carbide castable is laid in the remaining area.
  • the flue gas recirculation and secondary air nozzles 23 are arranged in the front and rear arch area of the water-cooled combustion chamber 4, and when the recirculated flue gas is used, the nitrogen oxide concentration at the outlet of the incinerator can be reduced.
  • one channel 5 and one two channel connecting flue 21 are laid with high thermal conductivity silicon carbide castable, to isolate the tube from direct contact with the flue gas to avoid high temperature corrosion of the water wall.
  • the screen superheater 9 is arranged on the upper part of the second channel 6, and a special high thermal conductivity plastic can be laid outside the tube screen while being located in the high-temperature flue gas area.
  • the front wall of the second channel 6 is arranged with a three-layer furnace soot blower that can perform steam soot blowing on the front wall to keep the radiation heating surface clean.
  • the lower front wall and the left and right walls are equipped with SNCR spray guns.
  • the lower part of the three-channel 7 is provided with an evaporator protector I of a serpentine type.
  • the horizontal channel 8 is provided with an evaporative protector II 10, a high-temperature superheater 11, a medium-temperature superheater 12, a low-temperature superheater 13, and an economizer 17, and the convection heating surface is suspended from the boiler steel structure 2 by a boom;
  • the superheater 11, medium temperature superheater 12, and low temperature superheater 13 all adopt a large lateral pitch and use a steam soot blower 18 for cleaning;
  • the economizer 17 is located in a low temperature area; the high temperature superheater 11, the middle temperature superheater 12, and the low temperature superheat Both the device 13 and the economizer 17 use a serpentine tube structure.
  • the invention also provides a high-temperature and high-pressure waste incineration ⁇ -type boiler, which includes a water-cooled combustion chamber, followed by a channel, a two-channel connection channel, a two-channel, a three-channel, a horizontal channel and a four-channel in order according to the flow direction of flue gas;
  • the superheater is arranged on the upper part of the second channel, and a special high thermal conductivity plastic is laid on the outside.
  • the evaporation protector I is arranged on the lower part of the three channels. In the horizontal channel, the evaporation protector II, high temperature superheater, medium temperature superheater, low temperature superheater, four channels Layout economizer.
  • the main steam temperature of the garbage incineration boiler is 540°C, and the main steam pressure is 9.8 MPa.
  • the flue gas recirculation and secondary air are provided with a common nozzle that can adjust the oxygen content of the boiler outlet according to the operating conditions.
  • the material of the screen superheater is TP347H, and a special high thermal conductivity plastic is laid outside to isolate the tube from contact with the flue gas, and is arranged in the high temperature area of the two channels.
  • one channel and two channels are designed independently, and the two channels can be equipped with furnace soot blowers and furnace denitration devices.
  • a water spray desuperheater is provided between the screen superheater, the high temperature superheater, the middle temperature superheater and the low temperature superheater.
  • the convection heating surface in the high temperature area uses a steam soot blower
  • the convection heating surface in the low temperature area uses a shock wave soot blower
  • the high-temperature superheater, medium-temperature superheater, low-temperature superheater and economizer adopt a serpentine tube structure.
  • the economizer is provided with a siphonic hydrophobic device.
  • the combustion chamber of the present invention adopts a fully water-cooled structure, and flue gas recirculation and secondary air nozzles are provided in the front and rear arch areas, which can effectively solve the furnace coking, reduce the concentration of nitrogen oxides, and improve the efficiency of garbage incineration boilers.
  • All the channels are laid with high thermal conductivity silicon carbide casting materials to solve the high temperature corrosion of the water-cooled wall, and at the same time increase the channel to absorb heat.
  • the screen-type superheater is arranged in the high temperature area of the upper part of the two channels, and a high thermal conductivity plastic is laid outside to ensure that the steam is heated to 540 °C, while effectively solving the problem of high temperature corrosion of the superheater.
  • Three-layer furnace soot blowers are arranged on the front wall of the second channel, while SNCR spray guns are arranged on the lower front wall and the left and right walls.
  • the three-channel entrance is arranged with an evaporator protector I and an evaporator protector II in order to reduce the flue gas temperature at the inlet of the high-temperature superheater.
  • Nickel-based surfacing anticorrosive coating is used in the area where the steam temperature of the high-temperature superheater is higher than 450°C, and TP347H is used for the rest to prevent high-temperature corrosion.
  • the economizer uses a serpentine tube structure to reduce the risk of leakage, and a siphon drain device is installed.
  • the main steam parameters of the garbage incineration boiler of the present invention are 9.8 MPa and 540°C, so that the thermal efficiency of the turbine generator set system of the supporting garbage incineration power plant is increased to more than 34%.
  • Figure 1 is a schematic diagram of the structure of a high temperature and high pressure (9.8MPa, 540°C) garbage incineration vertical boiler.
  • Fig. 2 is a steam flow diagram of the superheating system of Fig. 1.
  • Figure 3 is a schematic diagram of the structure of a high temperature and high pressure (9.8MPa, 540°C) garbage incineration horizontal boiler.
  • Fig. 4 is a steam flow diagram of the superheating system of Fig. 3.
  • Figure 5 is a schematic diagram of the structure of a ⁇ -type boiler for high temperature and high pressure (9.8MPa, 540°C) garbage incineration.
  • Fig. 6 is a steam flow diagram of the superheating system of Fig. 5.
  • FIG. 1 Incinerator system, 2. Boiler steel structure, 3. Drum, 4. Water-cooled combustion chamber, 5. One channel, 6. Two channels, 7. Three channels, 8. Four channels, 9. Screen type Superheater, 10. Evaporation protector II, 11. High temperature superheater, 12. Medium temperature superheater, 13. Low temperature superheater, 14. Primary water spray desuperheater, 15. Secondary water spray desuperheater, 16. Micro water spray desuperheater, 17. Economizer, 18. Steam soot blower, 19. Shock wave soot blower, 20. Furnace soot blower, 21. One or two channels connected to flue, 22. Evaporation protector I , 23. Flue gas recirculation and secondary air nozzles.
  • FIG. 1 Incinerator system, 2. Boiler steel structure, 3. Boiler drum, 4. Water-cooled combustion chamber, 5. One channel, 6. Two channels, 7. Three channels, 8. Horizontal channel, 9. Screen type Superheater, 10. Evaporation protector II, 11. High temperature superheater, 12. Medium temperature superheater, 13. Low temperature superheater, 14. Primary water spray desuperheater, 15. Secondary water spray desuperheater, 16. Micro water spray desuperheater, 17. Economizer, 18. Steam soot blower, 19. Shock wave soot blower, 20. Furnace soot blower, 21. One or two channels connected to flue, 22. Evaporation protector I , 23. Flue gas recirculation and secondary air nozzles.
  • incinerator system 2. boiler steel structure, 3. boiler drum, 4. water-cooled combustion chamber, 5. one channel, 6. two channels, 7. three channels, 8. horizontal channel, 9. screen type Superheater, 10. Evaporation protector II, 11. High temperature superheater, 12. Medium temperature superheater, 13. Low temperature superheater, 14. Primary water spray desuperheater, 15. Secondary water spray desuperheater, 16. Micro water spray desuperheater, 17. Economizer, 18. Steam soot blower, 19. Shock wave soot blower, 20. Furnace soot blower, 21. One or two channels connected to flue, 22. Evaporation protector I , 23. Flue gas recirculation and secondary air nozzles, 24. Four channels.
  • garbage is burned in an incinerator system (1), and the high-temperature flue gas generated enters the waste incineration vertical boiler for waste heat recovery, and high-quality steam is generated and sent to the steam turbine generator set.
  • a high temperature and high pressure (9.8MPa, 540°C) garbage incineration boiler is a vertical suspension structure, and a steel channel (2) of the boiler is suspended in sequence from one channel (5), one and two channels to the flue (21), and two channels ( 6), three channels (7) and four channels (8).
  • the water-cooled combustion chamber (4) is composed of membrane-type water-cooled walls around the grate.
  • Refractory bricks are laid in the area in contact with the garbage, and high thermal conductivity silicon carbide castables are laid in the remaining areas to reduce the temperature of the combustion chamber and avoid coking.
  • the flue gas recirculation and secondary air nozzles (23) are arranged in the front and rear arch area of the water-cooled combustion chamber (4).
  • the nitrogen oxide concentration at the outlet of the incinerator can be reduced, the combustion chamber can be prevented from coking, and the efficiency of garbage incineration boiler can be improved.
  • the ratio of secondary air and recirculated flue gas can be adjusted according to the calorific value of the garbage and the heat load.
  • One channel (5) and one two channel connecting flue (21) are laid with high thermal conductivity silicon carbide castable to isolate the tube from direct contact with the flue gas to avoid high temperature corrosion of the water wall.
  • the screen-type superheater (9) is arranged on the upper part of the second channel (6), and a special high thermal conductivity plastic is laid outside the tube screen at the same time in the high-temperature flue gas area to obtain a higher heat transfer efficiency, and at the same time, the flue gas is directly contacted with the tube to completely Solve the problem of high temperature corrosion of superheater.
  • the two-channel (6) front wall is equipped with a three-layer furnace soot blower, which can perform steam soot blowing on the front wall to keep the radiation heating surface clean.
  • SNCR spray guns are arranged on the lower front wall and the left and right walls to ensure the denitrification efficiency in the furnace.
  • the lower part of the three channels (7) is equipped with a evaporator protector I of a serpentine tube type, with a horizontal pitch of 270 mm, and steam soot is used at the same time.
  • Evaporation protector II (10), high temperature superheater (11), medium temperature superheater (12), low temperature superheater (13), four channel (8) internal economizer (17) are arranged in the three channels (7), as mentioned above
  • the convection heating surface is suspended from the boiler steel structure (2) by a boom.
  • the high-temperature superheater (11), medium-temperature superheater (12), and low-temperature superheater (13) all adopt a large lateral pitch, while using a steam soot blower (18) for cleaning, to ensure that the tube bundle does not accumulate dust and coking, and then avoid High temperature molten salt corrosion of pipes in high temperature areas.
  • the economizer (17) is located in a low temperature area, and the shock wave soot blower (19) is used for cleaning to reduce the initial investment and operating cost of the equipment.
  • the high-temperature superheater (11), medium-temperature superheater (12), low-temperature superheater (13), economizer (17) all adopt a serpentine tube structure, which has lower manufacturing costs and no fillet welding than the previous upper and lower header structures There is a risk of gap leakage, and at the same time, the economizer is equipped with a siphon type hydrophobic device to solve the problem of hydrophobicity of the economizer tube bundle during the hydraulic test and furnace shutdown.
  • the saturated steam from the drum (25) passes through the low-temperature superheater (26), the first-level water spray desuperheater (27), the intermediate-temperature superheater (28), and the second-level water spray desuperheater (29) ), high temperature superheater (30), micro water spray desuperheater (31), screen superheater (32), the steam is heated to the design temperature of 540 °C through the above equipment.
  • the desuperheating water comes from the boiler water supply mother pipe.
  • the heat of flue gas is mainly transferred to the screen superheater by radiation, and then the steam in the tube is heated to 540 °C through special plastics and tubes.
  • garbage is burned in the incinerator system (1), the high-temperature flue gas generated enters the waste incineration boiler for waste heat recovery, and high-quality steam is generated and sent to the steam turbine generator set.
  • a high temperature and high pressure (9.8MPa, 540°C) garbage incineration boiler has a horizontal suspension structure, and a steel channel (2) of the boiler is suspended in sequence from one channel (5), one and two channels to the flue (21), and two channels ( 6), three channels (7) and horizontal channels (8).
  • the water-cooled combustion chamber (4) is composed of membrane-type water-cooled walls around the grate.
  • Refractory bricks are laid in the area in contact with the garbage, and high thermal conductivity silicon carbide castables are laid in the remaining areas to reduce the temperature of the combustion chamber and avoid coking.
  • the flue gas recirculation and secondary air nozzles (23) are arranged in the front and rear arch area of the water-cooled combustion chamber (4).
  • the nitrogen oxide concentration at the outlet of the incinerator can be reduced, the combustion chamber can be prevented from coking, and the efficiency of garbage incineration boiler can be improved.
  • the ratio of secondary air and recirculated flue gas can be adjusted according to the calorific value of the garbage and the heat load.
  • One channel (5) and one two channel connecting flue (21) are laid with high thermal conductivity silicon carbide castable to isolate the tube from direct contact with the flue gas to avoid high temperature corrosion of the water wall.
  • the screen-type superheater (9) is arranged on the upper part of the second channel (6), and a special high thermal conductivity plastic is laid outside the tube screen at the same time in the high-temperature flue gas area to obtain a higher heat transfer efficiency, and at the same time, the flue gas is directly contacted with the tube to completely Solve the problem of high temperature corrosion of superheater.
  • the two-channel (6) front wall is equipped with a three-layer furnace soot blower, which can perform steam soot blowing on the front wall to keep the radiation heating surface clean.
  • SNCR spray guns are arranged on the lower front wall and the left and right walls to ensure the denitrification efficiency in the furnace.
  • the lower part of the three channels (7) is equipped with a evaporator protector I of a serpentine tube type, with a horizontal pitch of 270 mm, and steam soot is used at the same time.
  • Evaporation protector II (10), high temperature superheater (11), medium temperature superheater (12), low temperature superheater (13), economizer (17) are arranged in order in the horizontal channel (8).
  • the boom is suspended from the boiler steel structure (2).
  • the high-temperature superheater (11), medium-temperature superheater (12), and low-temperature superheater (13) all adopt a large lateral pitch, while using a steam soot blower (18) for cleaning, to ensure that the tube bundle does not accumulate dust and coking, and then avoid High temperature molten salt corrosion of pipes in high temperature areas.
  • the economizer (17) is located in a low temperature area, and the shock wave soot blower (19) is used for cleaning to reduce the initial investment and operating cost of the equipment.
  • the high-temperature superheater (11), medium-temperature superheater (12), low-temperature superheater (13), economizer (17) all adopt a serpentine tube structure, which has lower manufacturing costs and no fillet welding than the previous upper and lower header structures There is a risk of gap leakage, and at the same time, the economizer is equipped with a siphon type hydrophobic device to solve the problem of hydrophobicity of the economizer tube bundle during the hydraulic test and furnace shutdown.
  • the saturated steam from the drum (25) passes through the low-temperature superheater (26), the first-stage water spray desuperheater (27), the intermediate-temperature superheater (28), and the second-stage water spray desuperheater (29) ), high temperature superheater (30), micro water spray desuperheater (31), screen superheater (32), the steam is heated to the design temperature of 540 °C through the above equipment.
  • the desuperheating water comes from the boiler water supply mother pipe.
  • the heat of the flue gas is mainly transferred to the screen superheater by radiation, and then the steam in the tube is heated to 540 °C through the plastic and the tube in turn.
  • garbage is burned in the incinerator system (1), the high-temperature flue gas generated enters the waste incineration boiler for waste heat recovery, and high-quality steam is generated and sent to the steam turbine generator set.
  • a high temperature and high pressure (9.8MPa, 540°C) garbage incineration boiler is a ⁇ -type suspension structure, and a channel (5), a two-channel connection flue (21), and a two-channel (one channel) are suspended on the boiler steel structure (2) in sequence. 6), three channels (7), horizontal channels (8) and four channels (24).
  • the water-cooled combustion chamber (4) is composed of membrane-type water-cooled walls around the grate.
  • Refractory bricks are laid in the area in contact with the garbage, and high thermal conductivity silicon carbide castables are laid in the remaining areas to reduce the temperature of the combustion chamber and avoid coking.
  • the flue gas recirculation and secondary air nozzles (23) are arranged in the front and rear arch area of the water-cooled combustion chamber (4).
  • the nitrogen oxide concentration at the outlet of the incinerator can be reduced, the combustion chamber can be prevented from coking, and the efficiency of garbage incineration boiler can be improved.
  • the ratio of secondary air and recirculated flue gas can be adjusted according to the calorific value of the garbage and the heat load.
  • One channel (5) and one two channel connecting flue (21) are laid with high thermal conductivity silicon carbide castable to isolate the tube from direct contact with the flue gas to avoid high temperature corrosion of the water wall.
  • the screen-type superheater (9) is arranged on the upper part of the second channel (6), and a special high thermal conductivity plastic is laid outside the tube screen at the same time in the high-temperature flue gas area to obtain a higher heat transfer efficiency, and at the same time, the flue gas is directly contacted with the tube to completely Solve the problem of high temperature corrosion of superheater.
  • the two-channel (6) front wall is equipped with a three-layer furnace soot blower, which can perform steam soot blowing on the front wall to keep the radiation heating surface clean.
  • SNCR spray guns are arranged on the lower front wall and the left and right walls to ensure the denitrification efficiency in the furnace.
  • the lower part of the three channels (7) is equipped with a evaporator protector I of a serpentine tube type, with a horizontal pitch of 270 mm, and steam soot is used at the same time.
  • an evaporative protector II (10), a high-temperature superheater (11), a medium-temperature superheater (12), and a low-temperature superheater (13) are arranged in sequence, and an economizer (17) is arranged in the four-channel (24).
  • the aforementioned convection heating surfaces are suspended from the boiler steel structure (2) by a boom.
  • the high-temperature superheater (11), medium-temperature superheater (12), and low-temperature superheater (13) all adopt a large lateral pitch, while using a steam soot blower (18) for cleaning, to ensure that the tube bundle does not accumulate dust and coking, and then avoid High temperature molten salt corrosion of pipes in high temperature areas.
  • the economizer (17) is located in a low temperature area, and the shock wave soot blower (19) is used for cleaning to reduce the initial investment and operating cost of the equipment.
  • the high-temperature superheater (11), medium-temperature superheater (12), low-temperature superheater (13), economizer (17) all adopt a serpentine tube structure, which has lower manufacturing costs and no fillet welding than the previous upper and lower header structures There is a risk of gap leakage, and at the same time, the economizer is equipped with a siphon type hydrophobic device to solve the problem of hydrophobicity of the economizer tube bundle during the hydraulic test and furnace shutdown.
  • the saturated steam from the drum (25) passes through the low-temperature superheater (26), the first-stage water spray desuperheater (27), the intermediate-temperature superheater (28), and the second-stage water spray desuperheater (29) ), high temperature superheater (30), micro water spray desuperheater (31), screen superheater (32), the steam is heated to the design temperature of 540 °C through the above equipment.
  • the desuperheating water comes from the boiler water supply mother pipe.
  • the heat of the flue gas is mainly transferred to the screen superheater by radiation, and then the steam in the tube is heated to 540 °C through the plastic and the tube in turn.
  • the invention adopts a screen superheater of a waste incineration waste heat boiler whose main steam temperature is 540°C.
  • the screen superheater is composed of a heated tube screen, pins, special plastics, pipe clamps, upper header, flexible sealing device, hanging device and maintenance manhole.
  • the screen-type superheater can be laid with plastic to isolate the tube from contact with the flue gas and completely solve the high temperature corrosion.
  • the screen superheater can heat the steam to 540 °C, so that the thermal efficiency of the turbine generator set system of the supporting garbage incineration power plant can be increased to 34%.

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  • Thermal Sciences (AREA)

Abstract

La présente invention concerne un incinérateur de déchets à haute pression, à température élevée ayant une température de vapeur principale de 540 °C et une pression de vapeur principale de 9,8 MPa. L'incinérateur de déchets utilise une chambre (4) de combustion refroidie à l'eau, et comporte un premier canal (5), un canal (21), un deuxième canal (6) et un troisième canal (7) disposés séquentiellement le long d'une direction dans laquelle circule un gaz de combustion. Le canal (21) relie le premier canal au deuxième canal. Un surchauffeur (9) à platine est disposé au niveau d'une partie supérieure du deuxième canal (6). Le surchauffeur (9) à platine peut chauffer de la vapeur à 540 °C, ce qui permet d'augmenter l'efficacité thermique d'un système de turbogénérateur auxiliaire dans une centrale électrique à base d'incinération de déchets à 34 %.
PCT/CN2019/080033 2018-12-30 2019-03-28 Incinérateur de déchets à haute pression, à température élevée WO2020140337A1 (fr)

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
CN201811644026.4A CN110186047A (zh) 2018-12-30 2018-12-30 一种高温高压垃圾焚烧π式锅炉
CN201811646221.0A CN110006043A (zh) 2018-12-30 2018-12-30 一种高温高压垃圾焚烧立式锅炉
CN201811646698.9 2018-12-30
CN201811646221.0 2018-12-30
CN201811646698.9A CN110360569A (zh) 2018-12-30 2018-12-30 一种高温高压垃圾焚烧锅炉
CN201811648561.7A CN110220198A (zh) 2018-12-30 2018-12-30 一种高温高压垃圾焚烧卧式锅炉
CN201811648561.7 2018-12-30
CN201811644026.4 2018-12-30

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WO2020140337A1 true WO2020140337A1 (fr) 2020-07-09

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EP0671587A1 (fr) * 1993-12-31 1995-09-13 CONSIT S.r.l. Incinérateur de déchets combiné avec une seconde source thermique pour la production d'énergie électrique ou mécanique
US20090050076A1 (en) * 2005-09-30 2009-02-26 Kim Allan Dam-Johansen Boiler producing steam from flue gases with high electrical efficiency and improved slag quality
JP2014129914A (ja) * 2012-12-28 2014-07-10 Kawasaki Heavy Ind Ltd 腐食抑制装置付きボイラ及びボイラの腐食抑制方法
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