CN220356106U - Sulfation wind system with heater - Google Patents

Sulfation wind system with heater Download PDF

Info

Publication number
CN220356106U
CN220356106U CN202321497738.4U CN202321497738U CN220356106U CN 220356106 U CN220356106 U CN 220356106U CN 202321497738 U CN202321497738 U CN 202321497738U CN 220356106 U CN220356106 U CN 220356106U
Authority
CN
China
Prior art keywords
nozzle
heater
steam
blower
air
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202321497738.4U
Other languages
Chinese (zh)
Inventor
汤金华
杨平
谈河君
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China Nerin Engineering Co Ltd
Original Assignee
China Nerin Engineering Co Ltd
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 China Nerin Engineering Co Ltd filed Critical China Nerin Engineering Co Ltd
Priority to CN202321497738.4U priority Critical patent/CN220356106U/en
Application granted granted Critical
Publication of CN220356106U publication Critical patent/CN220356106U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • Y02P20/00Technologies relating to chemical industry
    • Y02P20/10Process efficiency
    • Y02P20/129Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines

Landscapes

  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)

Abstract

The utility model provides a sulfation wind system with a heater. The sulfation wind system with the heater comprises a blower, wherein a front pipeline of the blower is provided with an air suction door and an air quantity adjusting door, the air quantity adjusting door is arranged between the air suction door and the blower, and a rear pipeline of the blower is sequentially provided with a first flowmeter, a first temperature sensor, a first pressure sensor, a steam heater, a second temperature sensor, a second pressure sensor and a main pipe air valve. The sulfation wind system with the heater can reduce slag formation in the waste heat boiler, relieve the scouring of high-temperature flue gas to the waste heat boiler ceiling and avoid the low-temperature corrosion of the film wall around the salinization nozzle; the reasonable high-flow-rate salinized wind participates in the flue gas flow field in the organizing furnace, so that flue gas in the radiant hearth is more uniform, and the utilization rate of the heating surface of the radiant hearth of the waste heat boiler is improved.

Description

Sulfation wind system with heater
Technical Field
The utility model relates to a sulfation wind system with a heater.
Background
In the pyrometallurgy process of copper, the copper concentrate contains lead, zinc and other impurities in quite high quantity, and for various reasons, the impurities are brought into a waste heat boiler by flue gas in a form of smoke dust in a molten or semi-molten state in the smelting process, so that the adhesion is very strong, the waste heat boiler is subjected to large-scale slagging on a heating surface, the cleaning is difficult, and when the cleaning is serious, the furnace is stopped, explosive explosion cleaning is needed, so that the production safety and the operation rate are seriously influenced. In order to improve the condition of large slag formation in the furnace, the sulfation technology is adopted, and the characteristics of slag are changed, so that the originally molten smoke dust becomes loose after sulfation, is easy to clean, can reduce or even avoid accidents such as pipe explosion and the like caused by falling off and crushing film walls after large slag blocks are formed, and can also avoid the influence of slag removal caused by furnace shutdown on the operation rate.
Chinese patent CN102445088A discloses a method and apparatus for inhibiting slag formation in flash copper smelting waste heat boiler, in which high temperature flue gas entering copper smelting waste heat boiler contains more SO 2 Wherein a portion is converted into SO 3 Under certain conditions, the sulfuric acid is generated by combining with water vapor in the flue gas. When the film wall temperature of the boiler is lower than the dew point of sulfuric acid, the film wall of the boiler can be corroded at low temperature, and the low-temperature corrosion speed is high.
Disclosure of Invention
Based on the method, the utility model provides a sulfation wind system with a heater, which solves the technical problems that the slag is not easy to clear and the low temperature is corroded in a large block in a waste heat boiler of a copper metallurgical furnace.
The utility model provides a sulfation wind system with a heater, which comprises a blower, wherein a front pipeline of the blower is provided with an air suction door and an air quantity adjusting door, the air quantity adjusting door is arranged between the air suction door and the blower, a rear pipeline of the blower is sequentially provided with a first flowmeter, a first temperature sensor, a first pressure sensor, a steam heater, a second temperature sensor, a second pressure sensor and a main pipe air valve, the air quantity adjusting door is interlocked with the first flowmeter to control the total flow of salinized wind, the steam heater is used for heating air after the blower is pressurized, a heating medium of the steam heater is steam, a source of the steam is steam produced by a waste heat boiler, the steam is connected into the steam heater through the steam pipeline, and the steam pipeline is provided with a steam adjusting valve group, a second flowmeter, a thermometer and a third pressure sensor which are interlocked with the second temperature sensor and the second pressure sensor at an outlet of the steam heater, and the steam heater is used for controlling and adjusting the steam heater.
Further, the temperature of the salted air is 210 ℃ to 230 ℃.
Further, the steam regulating valve group is interlocked with the second temperature sensor and is used for controlling and regulating the produced air parameters.
Further, the system is characterized by further comprising a first nozzle, a second nozzle, a third nozzle and a fourth nozzle, wherein the first nozzle, the second nozzle, the third nozzle and the fourth nozzle are connected with the steam heater through branch pipes.
Further, the first nozzle, the second nozzle, the third nozzle and the fourth nozzle are arranged on the front wall, the front ceiling or the left and right side wall film walls of the inlet of the waste heat boiler, and the arrangement direction is the salinized air spraying direction.
Further, the branch pipeline comprises a first pipeline, a second pipeline, a third pipeline and a fourth pipeline which are distributed in sequence, a first control valve is arranged on the first pipeline, a second control valve is arranged on the second pipeline, a third control valve is arranged on the third pipeline, a fourth control valve is arranged on the fourth pipeline, and the first control valve, the second control valve, the third control valve and the fourth control valve are respectively used for controlling the use of the first nozzle, the second nozzle, the third nozzle and the fourth nozzle.
Further, the speed of the salinized wind sprayed into the waste heat boiler is 70-100m/s.
Further, the lift of the blower is not less than 7KPa.
Compared with the prior art, the utility model has the following advantages:
in the sulfated wind system with heater according to the present utility model, in the first aspect, the flue dust entering the exhaust-heat boiler contains a large amount of sulfide (Cu 2 S) and oxides (Cu) 2 O, pbO, znO) are stacked on the heating surface of the waste heat boiler to form slag blocks in a molten state, and are characterized by extremely strong cohesiveness, extremely high hardness and difficult removal. By utilizing the sulfation technology, the heated salinized wind is sprayed into a waste heat boiler through a reasonably arranged nozzle at a proper speed, and is fully mixed with high-temperature flue gas, so that the sulfation reaction of oxides and sulfides in the flue gas and oxygen is promoted. The sulfate reaction produces loose sulfate species (CuSO) 4 、PbSO 4 、ZnSO 4 ) And is easy to clean after that. Thereby solving the problems of safety accidents such as furnace shutdown or pipe explosion and the like caused by difficult removal of slag in the waste heat boiler, and the like.
In the second aspect, the salinized wind is heated to about 220 ℃ so as to avoid low-temperature corrosion of the film wall and the tube wall of the waste heat boiler caused by cold air.
In the third aspect, the high-flow-rate salinized wind plays a role in scattering high-temperature flue gas clusters, and other structures of the boiler are used as auxiliary materials, so that flue gas flows more uniformly in the radiation hearth, the purpose of improving the distribution of flue gas flow fields and temperature fields in the boiler is achieved, and the utilization rate of the heating surface of the waste heat boiler is improved.
In a fourth aspect, the salinization first nozzle is arranged at the furnace front or the furnace top of the front part, and heated salinization wind is sprayed into the waste heat boiler through a reasonably arranged nozzle at a proper speed. The salinized wind with proper high flow rate breaks up high-temperature flue gas clusters entering the waste heat boiler from the metallurgical furnace in the vertical direction, and simultaneously reduces the quantity and kinetic energy of the high-temperature flue gas clusters which are punched to the ceiling, thereby reducing the film wall heat load of the ceiling area, reducing the abrasion of the high-speed high-temperature flue gas punched to the film wall of the ceiling, and playing a certain protection role on the film wall of the ceiling.
Drawings
FIG. 1 is a schematic process flow diagram of a sulfation wind system with a heater of the present utility model;
in the figure: the air intake door 1, the air volume adjusting door 2, the blower 3, the first flowmeter 4, the first temperature sensor 5, the first pressure sensor 6, the steam heater 7, the second temperature sensor 8, the second pressure sensor 9, the main pipe air valve 10, the steam pipe 11, the steam adjusting valve group 12, the second flowmeter 13, the thermometer 14, the third pressure sensor 15, the branch pipe 16, the first control valve 17, the second control valve 18, the third control valve 19, the fourth control valve 20, the first nozzle 21, the second nozzle 22, the third nozzle 23, and the fourth nozzle 24.
Detailed Description
The following description of the embodiments of the present utility model will be made more fully hereinafter with reference to the accompanying drawings, in which embodiments of the utility model are shown, rather than in all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1, the utility model provides a sulfation wind system with a heater, which comprises a blower 3, wherein a front pipeline of the blower is provided with a suction door 1 and a wind volume adjusting door 2, the wind volume adjusting door 2 is arranged between the suction door and the blower, a rear pipeline of the blower is sequentially provided with a first flowmeter 4, a first temperature sensor 5, a first pressure sensor 6, a steam heater 7, a second temperature sensor 8, a second pressure sensor 9 and a main pipe wind valve 10, the wind volume adjusting door 2 is interlocked with the first flowmeter 4 to control the total flow of the sulfation wind, the steam heater is used for heating air after the blower is pressurized, a heating medium of the steam heater is steam, the source of the steam is steam generated by a waste heat boiler, the steam is connected into the steam heater 7 through a steam pipeline 11, and the steam pipeline is provided with a steam adjusting valve 12, a second flowmeter 13, a thermometer 14 and a third pressure sensor 15, and the second temperature sensor and the second pressure sensor are arranged at an outlet of the steam heater to control the steam heater, and the steam heater is used for controlling the heating valve to stabilize parameters of the sulfation wind.
In one embodiment, the temperature of the salted wind is 210 ℃ to 230 ℃.
In one embodiment, the system further comprises a first nozzle 21, a second nozzle 22, a third nozzle 23 and a fourth nozzle 24, which are connected to the steam heater by a branch conduit 16.
In one embodiment, the first nozzle, the second nozzle, the third nozzle and the fourth nozzle are arranged on a front wall, a front ceiling or left and right wall film walls of an inlet of the waste heat boiler, and the arrangement direction is that the spraying direction of the salinized wind is generally perpendicular to the flue gas beam.
Specifically, the blower 3 is connected to the steam heater 7, and the air is heated to a set temperature (about 220 ℃) after heat exchange with the steam, and then is sprayed into the waste heat boiler through the branch pipeline 16 and the salinization first nozzle 21, the second nozzle 22, the third nozzle 23 and the fourth nozzle 24 at a flow rate of 70-100m/s. The salinization first nozzle 21, the second nozzle 22, the third nozzle 23 and the fourth nozzle 24 are generally provided on the front wall, the front ceiling, or the left and right sidewall membrane walls of the waste heat boiler inlet. The arrangement direction of the salinization nozzles, namely the spraying direction of the salinization wind is generally perpendicular to the flue gas beam.
In one embodiment, the branch pipeline comprises a first pipeline, a second pipeline, a third pipeline and a fourth pipeline which are distributed in sequence, wherein a first control valve 17 is arranged on the first pipeline, a second control valve 18 is arranged on the second pipeline, a third control valve 19 is arranged on the third pipeline, a fourth control valve 20 is arranged on the fourth pipeline, and the first control valve, the second control valve, the third control valve and the fourth control valve are respectively used for controlling the use of the first nozzle, the second nozzle, the third nozzle and the fourth nozzle. Specifically, if the salinization air quantity needs to be reduced, which salinization nozzle needs to be closed, the valve on the branch pipeline 16 can be closed, and meanwhile, the air quantity adjusting door 2 in front of the blower 3 is adjusted according to the first flowmeter 4, so that the flow rate of the used salinization air nozzle is maintained in a reasonable range.
In one embodiment, the steam regulator valve block is interlocked with the second temperature sensor for controlling and regulating the air parameters of the production.
In one embodiment, the speed of the salinized wind sprayed into the waste heat boiler is 70-100m/s, and the flue gas simulation calculation result is specific.
In one embodiment, condensed water formed after heat exchange of the steam heater returns to a factory condensed water pipe network, so that resources are fully recovered, and the production cost is saved.
In one embodiment, the blower has a head of not less than 7KPa.
In one embodiment, the system employs programming control, and all pipes employ seamless steel tubing.
According to the sulfation wind system with the heater, the air of the copper smelting waste heat boiler is pressurized by the blower 3 and is sprayed into the air of the copper smelting waste heat boiler through the first nozzle 21, the second nozzle 22, the third nozzle 23 and the fourth nozzle 24, the salinization wind is the air, the blower 3 is adopted to suck the air from the air suction port 1, the air quantity regulating door 2 is arranged on the air port pipeline, and the opening degree of the air quantity regulating door 2 can be controlled in a linkage manner with the first flowmeter 4 arranged on the rear pipeline of the blower 3, so that the regulation of the salinization air quantity is realized.
According to the size of the salinized air volume, the first nozzle 21, the second nozzle 22, the third nozzle 23 and the fourth nozzle 24 are reasonable in design, the sizes and the numbers of the calibers of the first nozzle 21, the second nozzle 22, the third nozzle 23 and the fourth nozzle 24 are reasonable in arrangement position (on a radiation front wall, a front ceiling or an action side wall film wall of a waste heat boiler), and the proper salinized air flow velocity is fully mixed with the high-temperature flue gas mass in the vertical direction, so that salinization reaction of air and oxides and sulfides in smoke dust is facilitated. So as to solve the problem of slag bonding in the radiation hearth of the waste heat boiler.
For example, when the arrangement positions are on the radiation front wall and the front ceiling of the waste heat boiler, salinized wind sprayed from the salinized nozzles is perpendicular to Gao Wenyan air mass, and breaks up high-temperature flue gas mass, so that the amount and kinetic energy of scouring the film wall of the ceiling of the waste heat boiler by the high-temperature flue gas mass are reduced, and the protection effect on the waste heat boiler is achieved.
For example, if the working condition of the waste heat boiler changes, the salinization air quantity needs to be adjusted, and the air flow rate at the used nozzle is calculated. The flow rate is not too high or too low, and the too high flow rate can disturb the flow field of the flue gas in the furnace, is not beneficial to smoke dust sedimentation and the like; too low, insufficient mixing may result, one of which is detrimental to sulfation; secondly, the kinetic energy of the high-temperature flue gas clusters scattered into the furnace is lacked; thirdly, the radiation ceiling film wall of the waste heat boiler cannot be protected. When the amount of change in the salinization air volume is large, it is conceivable to increase or decrease the number of salinization nozzles used.
Wherein the steam heater heats normal-temperature air to 220 ℃, SO as to avoid the problem of film wall low-temperature corrosion around the salinization nozzle of the waste heat boiler, and the flue gas entering the copper smelting waste heat boiler contains more SO 2 Wherein a portion is further converted into SO 3 When the conditions are met, sulfuric acid is generated by combining with water vapor in the flue gas, and when the film wall temperature of the boiler is lower than the dew point of the sulfuric acid, the film wall of the boiler is corroded at low temperature.
The steam heater is made of 316L, the air is heated by utilizing steam produced by the waste heat boiler, the hot air after heat exchange enters the waste heat boiler, and the steam enters the comprehensive pipe network, so that the cost can be saved.
The sulfation wind system with the heater is connected with a blower, a steam heater, a control valve, a flowmeter, a temperature sensor, a pressure sensor and other instruments through pipelines, and air heated to about 220 ℃ is sprayed into the waste heat boiler through a nozzle arranged on the membrane wall of the waste heat boiler, so that the purposes of sulfation of smoke dust in the boiler and the like are realized. The instrument and the related valve arranged on the system pipeline are controlled in a linkage way, so that remote control can be realized. As the flow velocity at the salinization nozzle influences the structure of the flue gas flow field in the furnace, the flow velocity is generally controlled to be about 80-90 m/s, and specific data is determined by combining flue gas simulation results. The size and the number of the salinization nozzles on the system are matched with the salinization air quantity, and if the working condition of the waste heat boiler changes, the flow rate at the salinization nozzles is checked when the salinization air quantity needs to be increased or reduced, and the salinization air quantity and the salinization nozzle dosage are correspondingly adjusted.
In the sulfated wind system with heater according to the present utility model, in the first aspect, the flue dust entering the exhaust-heat boiler contains a large amount of sulfide (Cu 2 S) and oxides (Cu) 2 O, pbO, znO) are stacked on the heating surface of the waste heat boiler to form slag blocks in a molten state, and are characterized by extremely strong cohesiveness, extremely high hardness and difficult removal. By utilizing the sulfation technology, the heated salinized wind is sprayed into a waste heat boiler through a reasonably arranged nozzle at a proper speed, and is fully mixed with high-temperature flue gas, so that the sulfation reaction of oxides and sulfides in the flue gas and oxygen is promoted. The sulfate reaction produces loose sulfate species (CuSO) 4 、PbSO 4 、ZnSO 4 ) And is easy to clean after that. Thereby solving the problems of safety accidents such as furnace shutdown or pipe explosion and the like caused by difficult removal of slag in the waste heat boiler, and the like.
In the second aspect, the salinized wind is heated to about 220 ℃ so as to avoid low-temperature corrosion of the film wall and the tube wall of the waste heat boiler caused by cold air.
In the third aspect, the high-flow-rate salinized wind plays a role in scattering high-temperature flue gas clusters, and other structures of the boiler are used as auxiliary materials, so that flue gas flows more uniformly in the radiation hearth, the purpose of improving the distribution of flue gas flow fields and temperature fields in the boiler is achieved, and the utilization rate of the heating surface of the waste heat boiler is improved.
In a fourth aspect, the salinization first nozzle is arranged at the furnace front or the furnace top of the front part, and heated salinization wind is sprayed into the waste heat boiler through a reasonably arranged nozzle at a proper speed. The salinized wind with proper high flow rate breaks up high-temperature flue gas clusters entering the waste heat boiler from the metallurgical furnace in the vertical direction, and simultaneously reduces the quantity and kinetic energy of the high-temperature flue gas clusters which are punched to the ceiling, thereby reducing the film wall heat load of the ceiling area, reducing the abrasion of the high-speed high-temperature flue gas punched to the film wall of the ceiling, and playing a certain protection role on the film wall of the ceiling.
Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present utility model, and although the present utility model has been described in detail with reference to the foregoing embodiment, it will be apparent to those skilled in the art that modifications may be made to the technical solution described in the foregoing embodiment, or equivalents may be substituted for some of the technical features thereof, and any modifications, equivalents, improvements or changes thereof may be made without departing from the spirit and principle of the present utility model.

Claims (6)

1. A sulfated wind system with a heater, characterized by: the air conditioner comprises a blower, an air suction door and an air quantity adjusting door are arranged on a front pipeline of the blower, the air quantity adjusting door is arranged between the air suction door and the blower, a first flowmeter, a first temperature sensor, a first pressure sensor, a steam heater, a second temperature sensor, a second pressure sensor and a main pipe air valve are sequentially arranged on a rear pipeline of the blower, the air quantity adjusting door is interlocked with the first flowmeter to control the total flow of salinized air, the steam heater is used for heating air pressurized by the blower, a heating medium of the steam heater is steam, a source of the steam is steam produced by a waste heat boiler, the steam heater is connected to the steam pipeline through the steam pipeline, and a steam adjusting valve group, a second flowmeter, a thermometer and a third pressure sensor are arranged on the steam pipeline and are interlocked with the second temperature sensor and the second pressure sensor at an outlet of the steam heater to control and adjust the steam heater.
2. The sulfated wind system with heater of claim 1, wherein the temperature of the salted wind is 210 ℃ to 230 ℃.
3. The sulfated wind system with heater according to claim 2, wherein said steam regulating valve set is interlocked with said second temperature sensor for controlling and regulating the air parameters of the production.
4. A sulfated wind system with a heater according to any of claims 1-3, further comprising a first nozzle, a second nozzle, a third nozzle and a fourth nozzle, said first nozzle, said second nozzle, said third nozzle and said fourth nozzle being connected to said steam heater by branch pipes.
5. The sulfation wind system with heater of claim 4, wherein said branch pipe comprises a first pipe, a second pipe, a third pipe and a fourth pipe distributed in sequence, wherein said first pipe is provided with a first control valve, said second pipe is provided with a second control valve, said third pipe is provided with a third control valve, and said fourth pipe is provided with a fourth control valve, said first control valve, said second control valve, said third control valve and said fourth control valve are used for controlling the use of said first nozzle, said second nozzle, said third nozzle and said fourth nozzle, respectively.
6. The sulfated wind system with heater according to claim 5, wherein the blower has a head of no less than 7KPa.
CN202321497738.4U 2023-06-13 2023-06-13 Sulfation wind system with heater Active CN220356106U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202321497738.4U CN220356106U (en) 2023-06-13 2023-06-13 Sulfation wind system with heater

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202321497738.4U CN220356106U (en) 2023-06-13 2023-06-13 Sulfation wind system with heater

Publications (1)

Publication Number Publication Date
CN220356106U true CN220356106U (en) 2024-01-16

Family

ID=89503328

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202321497738.4U Active CN220356106U (en) 2023-06-13 2023-06-13 Sulfation wind system with heater

Country Status (1)

Country Link
CN (1) CN220356106U (en)

Similar Documents

Publication Publication Date Title
CN203442801U (en) Wall closing wind device for preventing high temperature corrosion of water wall of side wall of spiral opposed firing boiler
CN106197045B (en) Afterheat boiler system, rotary hearth furnace high-temperature dust-containing flue gas processing system and method
CN201744260U (en) Pervaporation spray cooling dry-type dust collector
CN108800174A (en) The deashing device and method of novel low low-level (stack-gas) economizer
CN108295633A (en) A kind of device and method for heat-engine plant desulfurized tower loop slurry cooling eliminating white smoke
CN108487956A (en) A kind of remodeling method that low pressure (LP) cylinder zero is contributed
CN220356106U (en) Sulfation wind system with heater
CN102679300B (en) Device and method for recovering waste heat during waste gas and waste liquid treatment
WO2021120465A1 (en) Flue gas backflow system of waste incineration waste heat boiler
CN116481331A (en) Sulfation wind system with heater
CN206897161U (en) A kind of flue gas waste heat recovery system and a kind of high-efficiency desulfurization Tower System
CN1037541A (en) The blast furnace gas control method for lowering temp
CN109136585B (en) Method for inhibiting generation of sulfur trioxide in high-temperature flue gas in copper smelting process
CN203960246U (en) The top hot blast air-supply arrangement of blast furnace iron notch
CN207907273U (en) It is a kind of prevent coal-burning boiler denitration be transformed after tail portion dust deposit in flue device
CN212955028U (en) Gas deacidification heat sink
CN205484240U (en) Fire ensaying cupellation furnace is with controllable type air gas circuit
CN208066095U (en) A kind of device for heat-engine plant desulfurized tower loop slurry cooling eliminating white smoke
CN212057305U (en) Waste incineration exhaust-heat boiler flue gas reflux system
CN110628978B (en) Europeanism top gas cooling waste heat recovery device
CN103134070A (en) Method for preventing erosion of heat exchange plate of plate type air prehearter
CN203159642U (en) Air quantity regulation device of blast furnace
CN219797267U (en) Hot air recirculation device of air preheater of gas boiler
CN205965485U (en) Non - catalytic reduction spray gun of selectivity suitable for full load denitration
CN106288829B (en) Reduce the gas sealing system of silver copper smelter waste heat boiler water-cooling wall dust stratification, bonding

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant