CN211451908U - Cupola furnace with energy-saving device - Google Patents
Cupola furnace with energy-saving device Download PDFInfo
- Publication number
- CN211451908U CN211451908U CN201922468912.2U CN201922468912U CN211451908U CN 211451908 U CN211451908 U CN 211451908U CN 201922468912 U CN201922468912 U CN 201922468912U CN 211451908 U CN211451908 U CN 211451908U
- Authority
- CN
- China
- Prior art keywords
- air
- blower
- return
- furnace
- return 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Vertical, Hearth, Or Arc Furnaces (AREA)
Abstract
The utility model discloses a cupola furnace with economizer belongs to cupola furnace technical field, including furnace body, cyclone, sack cleaner, first air-blower, chimney and second air-blower, still include the return air duct, the flue gas at furnace body top is collected the cover and is communicate through the pipeline in proper order cyclone, sack cleaner, first air-blower and chimney discharge after removing dust, the air outlet of second air-blower communicates the air intake of furnace body, return air duct one end intercommunication cyclone's the tuber pipe other end communicates the suction opening department of second air-blower, be provided with the return air valve on the return air duct, the control of return air valve the amount of wind of return air. The utility model discloses cupola furnace with economizer can carry out the part to high temperature waste gas and retrieve, has practiced thrift the energy, has reduced the exhaust emissions volume.
Description
Technical Field
The utility model relates to a cupola furnace technical field especially relates to a cupola furnace with economizer.
Background
The cupola furnace is one of important equipment for melting metal in the metallurgical casting production technology, and metal blocks or metal ingots are melted into molten metal through the cupola furnace for pouring metal castings. The cupola furnace is a smelting furnace with vertical cylindrical structure, and comprises a furnace body, a forehearth, a slag outlet, an exhaust gas outlet and the like. The cupola furnace is mainly used for producing metal castings such as cast iron and the like, and can also be used for matching converter steelmaking. The cupola furnace is called as a cupola furnace because the opening of the furnace top is upward.
However, the cupola furnaces of the prior art all have the following problems: high-temperature waste gas in the smelting process flows upwards along the inner cavity of the furnace body and flows out of the furnace body from the opening of the furnace top, wherein some waste gas is directly discharged and introduced into the atmosphere, and some waste gas is discharged into the atmosphere after being dedusted by a dedusting system according to the environmental protection requirement. These high temperature exhaust emission means have all kept the environment around the casting site in a fog-misted state throughout the year. Moreover, the coke ratio is high, the pollution is large, and the coke ratio is a big household for energy consumption and pollution discharge, which seriously restricts the development and growth of the casting industry at present with higher and higher environmental protection requirements. In addition, the high-temperature exhaust gas contains harmful gases such as CO2, SO2, N2, and a large amount of CO generated by incomplete combustion of coke, besides dust which is not completely treated, which not only pollutes the environment, but also causes CO poisoning to workers in a casting site to damage the health of the workers, and even death occurs, which has been a long-standing problem in the casting industry. Meanwhile, the emission of high-temperature exhaust gas causes a large amount of heat energy loss, and energy waste of combustible gases such as a large amount of CO, a small amount of H2 and CH4, and the like, which can be combusted.
Therefore, there is a need to develop a cupola furnace with an energy saving device for the above-mentioned drawbacks.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a cupola furnace with economizer can carry out the part to high temperature waste gas and retrieve, has practiced thrift the energy, has reduced the exhaust emissions volume.
In order to solve the technical problem, the utility model adopts the following technical scheme:
the utility model relates to a cupola with economizer, including furnace body, cyclone, sack cleaner, first air-blower, chimney and second air-blower, still include the return air duct, the flue gas at furnace body top is collected the cover and is linked together through the pipeline in proper order cyclone, sack cleaner, first air-blower and chimney discharge after removing dust, the air outlet of second air-blower communicates the air intake of furnace body, return air duct one end intercommunication cyclone's the play tuber pipe other end communicates the suction opening department of second air-blower, be provided with the return air valve on the return air duct, the return air valve control the amount of wind of return air.
Furthermore, an air mixing barrel is arranged at an air suction opening of the second air blower, a coarse filter screen is arranged at an inlet end of the air mixing barrel, the air return pipe is communicated with the side wall of the air mixing barrel, and an air outlet pipe flange of the air mixing barrel is communicated with an air suction opening of the second air blower.
Furthermore, one end of an air outlet pipe of the air mixing barrel is provided with a spiral air duct, and return air introduced by the return air pipe and fresh air are mixed and supplied through the spiral air duct.
Further, the air return valve specifically adopts a gate valve or a butterfly valve with adjustable opening.
Furthermore, the front furnace lining of the furnace body is a refractory material integrally poured furnace lining.
Furthermore, the lining of the hearth at the hot air nozzle of the furnace body is a refractory material integrally poured furnace lining.
Compared with the prior art, the utility model discloses a beneficial technological effect:
the utility model relates to a cupola with energy-saving device, through the setting of return air duct, be convenient for lead some high temperature waste gas through the preliminary dust removal processing back to the air suction opening of second air-blower, participate in burning again, can send a large amount of CO, a small amount of combustible gases such as H2 and CH4 that produce of insufficient combustion into the furnace body inner chamber and burn again, make full use of the energy; moreover, the high-temperature waste gas return air is directly mixed with the fresh air, so that the fresh air can be preliminarily preheated, the waste heat is utilized, and the heat loss is reduced. The cupola furnace with the energy-saving device can partially recycle high-temperature waste gas, saves energy and also reduces the waste gas emission.
In addition, the air mixing barrel is arranged at the air suction opening of the second air blower, air suction negative pressure is formed in the air mixing barrel, so that the air return pipe can be fully recovered, and the sucked fresh air can be conveniently subjected to primary filtration through the arrangement of the coarse filter screen, so that larger branches or garbage bags are prevented from entering the second air blower and damaging the second air blower; due to the arrangement of the spiral air duct, return air introduced by the return air duct can be fully mixed with fresh air for air supply, mixing heat exchange is facilitated, and the temperature of fresh air is increased; the return air valve of the gate valve or the butterfly valve with the adjustable opening is arranged, so that the return air valve can be adjusted conveniently to control the return air volume. The lining of the forehearth and the lining of the hearth are both made of refractory materials and integrally cast, the surface of the lining is smooth and continuous, the material casting is compact, the service life of the cupola furnace can be prolonged, and the maintenance workload of equipment is reduced. A large number of working records show that after the furnace lining is integrally poured, the maintenance period of re-building can be prolonged to about 200 furnaces.
Drawings
The present invention will be further explained with reference to the following description of the drawings.
FIG. 1 is a schematic view of the overall structure of a cupola furnace with an energy saving device according to the present invention;
FIG. 2 is a schematic view of the internal structure of the mixing drum of the present invention;
description of reference numerals: 1. a furnace body; 101. a forehearth; 102. an air inlet; 103. a hot air bladder; 104. a hot air pipe; 105. a hot air nozzle; 106. a feed gate; 107. a feeding platform; 108. a collection hood; 2. charging materials; 3. a cyclone dust collector; 4. a bag-type dust collector; 5. a first blower; 6. a chimney; 7. a return air duct; 701. a return air valve; 8. a second blower; 9. a mixing cylinder; 901. a coarse filter screen; 902. a spiral duct; 903. a side air inlet pipe; 904. an air outlet pipe.
Detailed Description
The core of the utility model is to provide a cupola furnace with economizer can carry out the part to high temperature waste gas and retrieve, has practiced thrift the energy, has reduced the exhaust emissions volume.
In the following, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In a specific embodiment, as shown in fig. 1, a cupola furnace with an energy-saving device comprises a furnace body 1, a cyclone dust collector 3, a bag-type dust collector 4, a first air blower 5, a chimney 6, a second air blower 8 and a return air pipe 7, wherein a flue gas collecting cover 108 at the top of the furnace body 1 is sequentially communicated with the cyclone dust collector 3, the bag-type dust collector 4, the first air blower 5 and the chimney 6 through pipelines to remove dust from high-temperature waste gas and then discharge the high-temperature waste gas. The air outlet of the second blower 8 is communicated with the air inlet 102 of the furnace body 1 to provide fresh air for the furnace body 1, one end of the return air pipe 7 is communicated with the air outlet pipe of the cyclone dust collector 3, the other end of the return air pipe is communicated with the air inlet of the second blower 8, the return air pipe 7 is provided with a return air valve 701, and the return air valve 701 controls the return air volume.
The utility model discloses a wind path ventilation process includes: the return air pipe 7 leads the high-temperature waste gas subjected to the preliminary dust removal treatment back to the air suction opening of the second air blower 8, the second air blower 8 blows the fresh air mixed with the high-temperature waste gas return air into the air inlet 102, the fresh air is heated in a hot air liner outside the furnace body 1 and is led back to a hot air nozzle 105 at the top of the furnace cylinder through a hot air pipe 104, the fresh air is injected to coke at the bottom layer of the high-temperature combustion furnace charge 2 to participate in combustion, and the furnace charge 2 is added into the inner cavity of the furnace body 1 through a feeding platform 107 and a feeding door. The waste gas generated by combustion is collected by a flue gas collecting cover 108 at the top of the furnace body 1 and is discharged after the high-temperature waste gas is dedusted by a cyclone dust collector 3, a bag-type dust collector 4, a first air blower 5 and a chimney 6 which are sequentially communicated by pipelines.
Through the arrangement of the air return pipe 7, part of the high-temperature waste gas subjected to primary dust removal treatment is conveniently led back to the air suction opening of the second air blower 8 to participate in combustion again, a large amount of CO, a small amount of combustible gases such as H2 and CH4 and the like generated by insufficient combustion can be sent into the inner cavity of the furnace body 1 to be combusted again, and energy is fully utilized; moreover, the high-temperature waste gas return air is directly mixed with the fresh air, so that the fresh air can be preliminarily preheated, the waste heat is utilized, and the heat loss is reduced. The cupola furnace with the energy-saving device can partially recycle high-temperature waste gas, saves energy and also reduces the waste gas emission.
In a specific embodiment of the present invention, as shown in fig. 1 and fig. 2, the air suction opening of the second air blower 8 is provided with a mixing air cylinder 9, the inlet end of the mixing air cylinder 9 is provided with a coarse filtering net 901, the side wall of the mixing air cylinder 9 is communicated with an air return pipe 7, and the air outlet pipe 904 of the mixing air cylinder 9 is communicated with the air suction opening of the second air blower 8 through a flange.
Particularly, mix air drum 9's air outlet pipe 904 one end and set up spiral duct 902, the return air that return air pipe 7 introduced mixes the air feed with fresh air through spiral duct 902 jointly, is convenient for the mixed heat transfer of new trend rotatory through-process.
Specifically, the return air valve 701 specifically adopts a gate valve or a butterfly valve with an adjustable opening degree. The gate valve or the butterfly valve is provided with an opening adjusting mechanism, so that the opening of the gate plate of the gate valve or the rotation angle of the butterfly valve can be conveniently controlled.
The air mixing barrel 9 is arranged at the air suction opening of the second air blower 8, air suction negative pressure is formed on the air mixing barrel 9, the air return pipe 7 can be fully recovered, and the arrangement of the coarse filter screen 901 facilitates primary filtration of sucked fresh air, so that larger branches or garbage bags are prevented from entering the second air blower 8 and damaging the second air blower 8; due to the arrangement of the spiral air duct 902, return air introduced by the return air duct 7 and fresh air can be mixed and supplied fully, mixing heat exchange is facilitated, and the temperature of the fresh air is increased; the return air valve 701 of the gate valve or the butterfly valve with the adjustable opening is arranged, so that the return air valve 701 can be adjusted conveniently to control the return air volume.
In a specific embodiment of the present invention, as shown in fig. 1, the lining of the forehearth 101 of the furnace body 1 is a refractory material integrally cast lining. Further, the lining of the hearth at the hot blast nozzle 105 of the furnace body 1 is a refractory material integrally poured lining. However, most cupola furnaces in the prior art adopt refractory bricks to build furnace linings, use refractory cement to pointing, and the surface is not smooth enough, so the erosion through molten iron slag is easy to damage and corrode, the service life is short, and after 5-10 furnaces, the cupola furnaces need to be built again, and the maintenance workload is large.
The lining of the forehearth 101 and the lining of the hearth are both made of refractory materials and are integrally poured, the surface of the lining is smooth and continuous, the material pouring is compact, the service life of the cupola furnace can be prolonged, and the maintenance workload of equipment is reduced. A large number of working records show that after the furnace lining is integrally poured, the maintenance period of re-building can be prolonged to about 200 furnaces.
The cupola with the energy-saving device is convenient for leading part of high-temperature waste gas subjected to primary dust removal treatment back to the air suction opening of the second air blower 8 through the arrangement of the return air pipe 7 to participate in combustion again, and can send a large amount of combustible gas such as CO, a small amount of combustible gas such as H2 and CH4 generated by insufficient combustion into the inner cavity of the furnace body 1 for secondary combustion, thereby fully utilizing energy; moreover, the high-temperature waste gas return air is directly mixed with the fresh air, so that the fresh air can be preliminarily preheated, the waste heat is utilized, and the heat loss is reduced. The cupola furnace with the energy-saving device can partially recycle high-temperature waste gas, saves energy and also reduces the waste gas emission. In addition, the air mixing barrel 9 is arranged at the air suction opening of the second air blower 8, air suction negative pressure is formed in the air mixing barrel 9, the air return pipe 7 can be fully recovered, and the arrangement of the coarse filter screen 901 facilitates primary filtering of sucked fresh air, so that larger branches or garbage bags are prevented from entering the second air blower 8, and the second air blower 8 is prevented from being damaged; due to the arrangement of the spiral air duct 902, return air introduced by the return air duct 7 and fresh air can be mixed and supplied fully, mixing heat exchange is facilitated, and the temperature of the fresh air is increased; the return air valve 701 of the gate valve or the butterfly valve with the adjustable opening is arranged, so that the return air valve 701 can be adjusted conveniently to control the return air volume. The lining of the forehearth 101 and the lining of the hearth are both made of refractory materials and are integrally poured, the surface of the lining is smooth and continuous, the material pouring is compact, the service life of the cupola furnace can be prolonged, and the maintenance workload of equipment is reduced. A large number of working records show that after the furnace lining is integrally poured, the maintenance period of re-building can be prolonged to about 200 furnaces.
The above-mentioned embodiments are only intended to describe the preferred embodiments of the present invention, but not to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art without departing from the design spirit of the present invention should fall into the protection scope defined by the claims of the present invention.
Claims (6)
1. The utility model provides a cupola furnace with economizer, includes furnace body (1), cyclone (3), sack cleaner (4), first air-blower (5), chimney (6) and second air-blower (8), its characterized in that: still include return air duct (7), the flue gas at furnace body (1) top is collected cover (108) and is communicate in proper order through the pipeline cyclone (3), sack cleaner (4), first air-blower (5) and chimney (6) are removed dust the back and are discharged, the air outlet of second air-blower (8) communicates air intake (102) of furnace body (1), return air duct (7) one end intercommunication the play tuber pipe other end of cyclone (3) communicates the suction opening department of second air-blower (8), be provided with return air valve (701) on return air duct (7), return air valve (701) control the amount of wind of return air.
2. The cupola furnace with an economizer according to claim 1, wherein: an air suction opening of the second air blower (8) is provided with a mixing air duct (9), a coarse filter screen (901) is arranged at an inlet end of the mixing air duct (9), the side wall of the mixing air duct (9) is communicated with the air return duct (7), and an air outlet pipe (904) of the mixing air duct (9) is communicated with an air suction opening of the second air blower (8) in a flange mode.
3. The cupola furnace with an economizer according to claim 2, wherein: one end of an air outlet pipe (904) of the air mixing barrel (9) is provided with a spiral air duct (902), and return air and fresh air introduced by the return air pipe (7) are mixed and supplied through the spiral air duct (902).
4. The cupola furnace with an economizer according to claim 1, wherein: the air return valve (701) is a gate valve or a butterfly valve with adjustable opening.
5. The cupola furnace with an economizer according to claim 1, wherein: the lining of the forehearth (101) of the furnace body (1) is a refractory material integrally poured furnace lining.
6. The cupola furnace with an energy saving device according to claim 1 or 5, wherein: the lining of the hearth at the hot air nozzle (105) of the furnace body (1) is a refractory material integrally poured lining.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922468912.2U CN211451908U (en) | 2019-12-31 | 2019-12-31 | Cupola furnace with energy-saving device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922468912.2U CN211451908U (en) | 2019-12-31 | 2019-12-31 | Cupola furnace with energy-saving device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211451908U true CN211451908U (en) | 2020-09-08 |
Family
ID=72301237
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922468912.2U Expired - Fee Related CN211451908U (en) | 2019-12-31 | 2019-12-31 | Cupola furnace with energy-saving device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211451908U (en) |
-
2019
- 2019-12-31 CN CN201922468912.2U patent/CN211451908U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105441687A (en) | Dust recycling process and system for iron and steel plant | |
| CN108866270A (en) | Steelmaking equipment | |
| CN2859431Y (en) | Intermittent combustion type casting waste sand roasting furnace | |
| CN107101196A (en) | A kind of biomass boiler | |
| CN208472142U (en) | Steelmaking equipment | |
| CN106679402A (en) | Energy-saving environment-friendly efficient hot blast cupola | |
| CN211451908U (en) | Cupola furnace with energy-saving device | |
| CN201565226U (en) | System for dedusting smoke discharged in smelting outside furnace | |
| CN104232929B (en) | A kind of higher-grade composition brass refining furnace system | |
| CN204625480U (en) | A kind of rotary kiln device of constant temperature indirect calcination Wingdale | |
| CN201093859Y (en) | High-efficiency energy-saving environment protection smelting furnace | |
| CN103063014B (en) | Energy-saving and environment-friendly cupola furnace | |
| CN209537586U (en) | A kind of energy conservation and environmental protection reviver multicell metal smelting-furnace | |
| CN206739336U (en) | A kind of converter dedusting line flue automatic ash removing device | |
| CN203024570U (en) | Energy-saving environmental-friendly cupola furnace | |
| CN215724979U (en) | Water-cooling hot-air cupola with long furnace life | |
| CN206875938U (en) | A kind of energy-saving, environment-friendly and high-efficiency blast-heating cupola | |
| CN206875939U (en) | A kind of environmentally friendly furnace cupola | |
| CN213841714U (en) | Cupola furnace with energy-saving device | |
| CN2809547Y (en) | Cupola with two rows of large space tuyere and long service life | |
| CN206351234U (en) | Shell mould sintering equipment | |
| CN214666115U (en) | Movable AOD furnace flue gas waste heat heating device | |
| CN208980752U (en) | A kind of short route energy conservation casting blast furnace | |
| CN2711660Y (en) | Hot air cupola | |
| CN109518000A (en) | A kind of energy conservation and environmental protection reviver multicell metal smelting-furnace and processing method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200908 Termination date: 20211231 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |