CN215002967U - A sintering-pelletizing process waste gas recycling system and sintering-pelletizing system - Google Patents
A sintering-pelletizing process waste gas recycling system and sintering-pelletizing system Download PDFInfo
- Publication number
- CN215002967U CN215002967U CN202120073364.8U CN202120073364U CN215002967U CN 215002967 U CN215002967 U CN 215002967U CN 202120073364 U CN202120073364 U CN 202120073364U CN 215002967 U CN215002967 U CN 215002967U
- Authority
- CN
- China
- Prior art keywords
- sintering
- section
- flue gas
- pelletizing
- cooling
- 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.)
- Withdrawn - After Issue
Links
Images
Landscapes
- Manufacture And Refinement Of Metals (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
本实用新型公开了一种烧结‑球团工艺废气循环利用系统及烧结‑球团系统。废气再利用系统包括：第一引风管，连接在球团工艺中的链篦机的过渡预热段与烧结工艺中的烧结机热风罩之间；第二引风管，连接在所述链篦机的干燥一段与所述烧结机热风罩之间。本实用新型的烧结‑球团工艺的废气再利用系统烟气综合利用率高，且占地小，投资少。
The utility model discloses a waste gas recycling system of a sintering-pelletizing process and a sintering-pelletizing system. The waste gas reuse system includes: a first draft pipe, connected between the transitional preheating section of the grate machine in the pelletizing process and the hot air hood of the sintering machine in the sintering process; a second draft pipe, connected to the chain Between the drying section of the grate and the hot air hood of the sintering machine. The exhaust gas reuse system of the sintering-pelletizing process of the utility model has high comprehensive utilization rate of flue gas, occupies a small area and requires less investment.
Description
Technical Field
The utility model relates to the technical field of environmental protection, especially, relate to a sintering and pelletizing technology waste gas cyclic utilization system.
Background
In smelters, steel processing plants and the like, grate-rotary kiln-circular cooler pelletizing and sintering processes are commonly used.
Referring to fig. 1, in the production process of the grate-rotary kiln-circular cooler pellet process, the grate 11 is divided into a first drying section 111, a second drying section 112, a transition preheating section 113 and a preheating section 114 according to the sequence of heat exchange between flue gas and pellets; the pellets preheated by the grate 11 enter the rotary kiln 12 for roasting, and the roasted pellets enter the pellet circular cooler 13 for cooling; the cooling process of the pellet circular cooler 13 is divided into a cooling first section 131, a cooling second section 132 and a cooling third section 133, and the cooled pellets meet the requirements of transportation and storage. The hot gas after each section of heat exchange in the cooling process of the pellet circular cooler 13 is recycled, as shown in fig. 1, the gas temperature of the cooling section 131 is the highest, the reverse material flow enters the rotary kiln 12 to participate in roasting, the hot waste gas after roasting enters the preheating section 114 of the chain grate 11, and the green pellets are guided to the drying section 112 for drying through the dust remover 14 and the heat return fan 15 after being preheated; the gas in the cooling second section 132 enters the transition preheating section 113 to further reduce the moisture of the pellets; the waste gas of the transition preheating section 113 and the waste gas of the drying second section 112 are led to the main pellet dust collector 16, and are led into the desulfurization and denitrification device 18 through the main pellet exhaust fan 17 after dust fall, and the flue gas is discharged through the main chimney 19 after reaching the standard after being treated. The cooling three-stage 133 gas enters the drying one-stage 111 to dry the green pellets, and the dried exhaust gas passes through the drying dust collector 101 and the drying exhaust fan 102 and is exhausted from the chimney 19.
However, in the production process of the sintered ore in the sintering process, the finished ore after the sintering process is in a high temperature state, and in order to reduce the temperature of the sintered ore, the sintered ore is usually cooled by a ring cooling machine, and the hot sintered ore moves on the ring cooling machine and is reduced from the high temperature to below 100 ℃, so that the requirements of transportation and storage are met. One part of the hot air after heat exchange is led to the waste heat boiler to generate steam, and the other part of the hot air returns to the hot air hood of the sintering machine to be used for hot air sintering. Referring to fig. 2, in the sinter-ring cooling process, the mixture to be sintered (containing sinter ore components and fuel components) is arranged on the sintering machine trolley 22 through the mixing bin 21, the mixture moves on the sintering machine trolley 22 (from left to right in fig. 2), sequentially passes through the ignition furnace 23 to ignite the surface of the mixture, and then under the action of the main sintering exhaust fan 24, the gas flow on the surface of the mixture is increased, so that the mixture layer is combusted from top to bottom, meanwhile, the air passes through the layer, after participating in sintering, is collected to the main flue 26 through the air box 251 and the air box branch pipe 252, sequentially passes through the main sintering dust collector 27, enters the main sintering desulfurization and denitrification device 210, and is discharged from the main sintering chimney 29 after reaching the standard. The sintered ore after ignition and sintering is discharged onto the sintering ring cooling machine 31, the sintered ore is cooled to be below 100 ℃ through the air blower 32, the requirement of transportation and storage is met, the sintering ring cooling machine 31 is divided into three sections of high section, middle section and low section according to the temperature of waste gas, generally speaking, the waste gas in the high temperature section 311 is subjected to waste heat recovery by using a boiler 33, the waste gas in the middle temperature section 312 is led to a hot air hood 36 of a sintering machine through a dust remover 34 and a sintering circulating fan 35 for hot air sintering, and the waste gas in the low temperature section 313 is discharged in an unorganized mode.
However, in the grate-rotary kiln-circular cooler pelletizing process and the sintering-circular cooler process, various exhaust emission and purification devices may occur; the drying section 111 and the transition preheating section 113 of the grate 11 in the grate-rotary kiln-circular cooler pelletizing process are not effectively utilized; meanwhile, the waste gas in the middle and low temperature section of the sintering-ring cooling process is discharged in an unorganized mode, so that the pollution risk is high, and the energy is wasted.
In view of the above, there is a need to design a new waste gas recycling system for sintering-pelletizing process to solve the above technical problems.
SUMMERY OF THE UTILITY MODEL
The main object of the present invention is to provide a new waste gas recycling system for sintering-pelletizing process, which aims to solve the technical problems of low waste gas recycling efficiency, high emission, large pollution, large occupied area, high energy consumption, and unorganized emission of waste gas in low temperature section of sintering-ring cooling process in the prior sintering-pelletizing process.
In order to achieve the above object, the present invention provides a waste gas recycling system for sintering-pelletizing process, comprising:
the first air guiding pipe is connected between a transition preheating section of a chain grate in a pelletizing process and a hot air cover of a sintering machine in a sintering process and is used for guiding the flue gas of the transition preheating section out of the hot air cover of the sintering machine;
and the second induced air pipe is connected between the drying section of the chain grate and the hot air cover of the sintering machine and is used for guiding the flue gas of the drying section to the hot air cover of the sintering machine.
Preferably, the third induced draft pipe is connected between a flue gas outlet of the medium temperature section of the sintering circular cooler of the sintering process and the cooling section of the pellet circular cooler of the pellet process, and is used for guiding the flue gas of the medium temperature section out of the cooling section;
and the fourth induced draft pipe is connected between the flue gas outlet of the low-temperature section of the sintering circular cooler and the cooling second section of the pellet circular cooler and is used for guiding the flue gas of the low-temperature section to the cooling second section.
Preferably, the air cleaner further comprises a dust remover arranged on any one or more of the first induced air pipe, the second induced air pipe, the third induced air pipe and the fourth induced air pipe.
Preferably, the first cooling section and the second cooling section of the pellet circular cooler are both connected with a variable-frequency cooling fan, and the third induced air pipe and/or the fourth induced air pipe are/is correspondingly connected with the variable-frequency cooling fan.
Preferably, the hot air hood further comprises an air collecting pipe, one end of the air collecting pipe is communicated with the third induced air pipe and the fourth induced air pipe, and the other end of the air collecting pipe is communicated with the hot air hood of the sintering machine.
Preferably, the air converging pipe is also provided with a dust remover, an exhaust fan and an air mixing chamber.
Preferably, the system further comprises a shared flue gas purification device and a shared chimney, wherein the shared flue gas purification device is communicated with a flue gas outlet of the drying second section of the chain grate and a flue gas outlet of the sintering machine.
Preferably, a dust remover and an exhaust fan are further arranged between the flue gas outlet of the drying second section and the common flue gas purification equipment.
Preferably, the flue gas purification equipment is desulfurization and denitrification purification equipment.
The utility model also provides a sintering-pelletizing system, including the sintering machine and the cold machine of sintering ring that are used for sintering process to and be used for the cold machine of pellet ring, rotary kiln and the grate of pellet technology, still include the waste gas system of recycling as foretell sintering-pelletizing process.
Preferably, the flue gas at the cooling section of the pellet circular cooler is introduced into the rotary kiln through a flue gas channel; the flue gas of the cooling second section is guided into the transition preheating section through an induced draft tube; the flue gas of the preheating section is guided into the drying section through an induced draft pipe; and the flue gas in the high-temperature section of the sintering circular cooler is poured into a boiler for reutilization.
In the scheme of this application, the waste gas recycling system of sintering-pelletizing technology includes: the first air guiding pipe is connected between a transition preheating section of a chain grate in a pelletizing process and a hot air cover of a sintering machine in a sintering process and is used for guiding the flue gas of the transition preheating section out of the hot air cover of the sintering machine; the second induced draft pipe is connected between the drying section of the chain grate and the hot air cover of the sintering machine and is used for guiding the flue gas of the drying section to the hot air cover of the sintering machine; the third induced draft pipe is connected between a flue gas outlet of the medium temperature section of the sintering circular cooler of the sintering process and the cooling section of the pellet circular cooler of the pellet process and is used for guiding the flue gas of the medium temperature section to the cooling section; and the fourth induced draft pipe is connected between the flue gas outlet of the low-temperature section of the sintering circular cooler and the cooling second section of the pellet circular cooler and is used for guiding the flue gas of the low-temperature section to the cooling second section.
Compared with the prior art, the waste gas recycling system for the sintering-pelletizing process has the following advantages:
(1) hot waste gas from the middle temperature section of the sintering circular cooler enters the pellet circular cooler for cooling for one section, the air temperature entering the rotary kiln after heat exchange is higher, the fuel consumption of the rotary kiln for raising the air temperature to meet the temperature required by pellet roasting is reduced, and hot air is used as a cooling medium, so that the problem that the strength of pellets is reduced due to the fact that the temperature difference between the air temperature and the material temperature is too large when hot pellets are quenched is avoided;
(2) hot waste gas from the low-temperature section of the sintering circular cooler enters the second cooling section of the pellet circular cooler, the air temperature introduced to the transition preheating section after heat exchange is higher, the length of the transition preheating section can be shortened, the specification of the chain grate machine can be reduced, and the investment can be saved;
(3) waste gas from the transition preheating section of the pellet chain grate does not enter a pellet waste gas treatment system any more, but enters a sintering system together with a section of waste gas dried by the chain grate, and is uniformly mixed through a gas mixing chamber, so that the treatment capacity of the pellet waste gas treatment system is reduced, and the discharge capacity of the waste gas dried by the section of waste gas is reduced;
(4) the waste gas treatment of the sintering and pelletizing processes can share one set of desulfurization and denitrification device and a chimney, so that the occupied area, investment and operating cost are reduced, a main system can be co-constructed, public and auxiliary facilities can be shared, and the land and investment are saved;
(5) the waste gas containing SO2 in the transition preheating section is enriched by sintering flue gas, and the waste gas in the drying section 111 is introduced to adjust the oxygen content, SO that the sintering production can be met, and the emission is reduced.
(6) Waste gas without a transition preheating section enters a dust treatment system, the specification of a main pellet dust collector is reduced, the occupied area, investment and operating cost of the main pellet dust collector are reduced, the investment of an ash conveying system and secondary pollution caused by the ash conveying system are reduced, and the energy consumption of the system is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic diagram of a process structure of a grate-rotary kiln-circular cooler pelletizing in the prior art;
FIG. 2 is a schematic diagram of a prior art sinter-ring cooler process configuration;
fig. 3 is a schematic structural view of an exhaust gas recycling system of the sintering-pelletizing system of the utility model.
The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying 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 efforts belong to the protection scope of the present invention.
It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
Referring to fig. 3, a schematic structural diagram of a waste gas recycling system (not shown) of a sintering-pelletizing process according to the present invention is shown.
The waste gas recycling system is used for recycling the drying section 111 and the transition preheating section 113 of the chain grate 11 of the sintering-pelletizing system and recycling the waste gas of the medium-low temperature section of the sintering circular cooler.
Specifically, in the pellet process, the drying grate 11 is divided into a drying section 111, a drying section 112, a transition preheating section 113 and a preheating section 114 according to the sequence of heat exchange between flue gas and pellets; the pellets preheated by the grate 11 enter the rotary kiln 12 for roasting, and the roasted pellets enter the pellet circular cooler 13 for cooling; the cooling process of the pellet circular cooler 13 is divided into a cooling first section 131, a cooling second section 132 and a cooling third section 133. The gas temperature of the first cooling section 131 of the pellet circular cooler 13 is the highest, the reverse material flow enters the rotary kiln 12 to participate in roasting, the roasted hot waste gas enters the preheating section 114 of the chain grate 11, and the green pellets are guided to the second drying section 112 for drying through the dust remover 14 and the heat return fan 15 after being preheated; the gas in the cooling section 132 enters the transition preheating section 113 to further reduce the moisture of the pellets.
In addition, in the sintering process, the mixture to be sintered (containing sinter ore components and fuel components) is arranged on a sintering machine trolley 22 through a mixing bin 21, the mixture moves on the sintering machine trolley 22 (from left to right in fig. 2), sequentially passes through an ignition furnace 23 to ignite the surface of the mixture, and then under the action of a main sintering exhaust fan 24, the gas flow on the surface of the mixture is increased, so that the mixture layer is combusted from top to bottom, meanwhile, air passes through the layer, and after the mixture participates in sintering, the mixture is collected to a main flue 26 through an air box 251 and an air box branch pipe 252, and then sequentially passes through a main sintering dust collector 27 and a main sintering exhaust fan 28 to enter the treatment and discharge steps. And the sintered ore after ignition sintering is discharged to the sintering circular cooler 31. The sintering circular cooler 31 is divided into three stages, i.e., a high stage 311 and a medium stage 311 according to the temperature of the exhaust gas, and the exhaust gas is generally used for recovering waste heat by the boiler 33.
In the exhaust gas recycling system of the sintering-pelletizing process of the present embodiment, the system comprises: a first induced draft pipe 401 and a second induced draft pipe 402.
Specifically, the first air guiding pipe 401 is connected between the transition preheating section 113 of the grate 11 in the pelletizing process and the hot air hood 36 of the sintering machine in the sintering process, and is used for guiding the flue gas of the transition preheating section 113 out to the hot air hood 36 of the sintering machine;
and the second induced air pipe 402 is connected between the drying section 111 of the chain grate 11 and the hot air hood 36 of the sintering machine, and is used for guiding the flue gas of the drying section 111 out to the hot air hood 36 of the sintering machine.
That is, the flue gas from the transition preheating section 113 and the drying section 111 of the grate 11 is introduced into the hot air hood 36 of the sintering machine, and then is treated and discharged after participating in sintering under the action of the main exhaust fan 28 of the sintering system.
Further, in the exhaust gas recycling system of the sintering-pelletizing process of the present embodiment, a third induced air duct 403 and a fourth induced air duct 404 are further included.
The third induced draft pipe 403 is connected between the flue gas outlet of the intermediate temperature section 312 of the sintering circular cooler 31 in the sintering process and the cooling section 131 of the pellet circular cooler 13 in the pellet process, and is used for guiding the flue gas of the intermediate temperature section 312 to the cooling section 131;
and the fourth induced draft pipe 404 is connected between the flue gas outlet of the low temperature section 313 of the sintering circular cooler 31 and the cooling second section 132 of the pellet circular cooler 13, and is used for guiding the flue gas of the low temperature section 313 out to the cooling second section 132.
That is, the gas with lower temperature in the low temperature section 313 of the sintering circular cooler 31 is used for cooling the high temperature pellets at the cooling end 131 of the pellet circular cooler 13, and the flue gas in the middle temperature section 312 is used for cooling the second section 132; meanwhile, the flue gas of the cooling section 132 is guided into the transition preheating section 113, then returns to the hot air hood 36 of the sintering machine through the first induced draft tube 401, and then is treated and discharged after participating in sintering under the action of the main exhaust fan 28 of the sintering system; however, the reverse flow of the cooled end 131 enters the rotary kiln 12 to participate in the roasting, the hot exhaust gas after roasting enters the preheating section 114 of the chain grate 11, then enters the drying section 112 to dry the green pellets, and finally the flue gas from the drying section 112 is treated and discharged.
Compared with the prior art, the waste gas recycling system of the sintering-pelletizing process of the utility model comprises:
(1) hot waste gas from the middle temperature section 312 of the sintering circular cooler 31 enters the pellet circular cooler 11 to cool the first section 111, the air temperature entering the rotary kiln 12 after heat exchange is higher, the fuel consumption that the rotary kiln 12 raises the air temperature to meet the temperature required by pellet roasting is reduced, and hot air is used as a cooling medium, so that the problem that the strength of the pellets is reduced due to the fact that the temperature difference between the air temperature and the material temperature is too large when the hot pellets are quenched is avoided;
(2) the hot waste gas from the low-temperature section 313 of the sintering circular cooler 31 enters the second cooling section 132 of the pellet circular cooler 13, the air temperature led to the transition preheating section 113 after heat exchange is higher, the length of the transition preheating section 113 can be shortened, the specification of the chain grate machine can be reduced, and the investment can be saved;
(3) waste gas from the transition preheating section 113 of the pellet chain grate 11 does not enter a pellet waste gas treatment system any more, but enters a sintering system together with waste gas from the drying section 11 of the pellet chain grate 11, and is uniformly mixed by a gas mixing chamber 407, so that the treatment capacity of the pellet waste gas treatment system is reduced, and the discharge capacity of the waste gas from the drying section is reduced;
(4) the waste gas treatment of the sintering and pelletizing processes can share one set of desulfurization and denitrification device and a chimney, so that the occupied area, investment and operating cost are reduced, a main system can be co-constructed, public and auxiliary facilities can be shared, and the land and investment are saved;
(5) the waste gas containing SO2 in the transition preheating section 113 is enriched by sintering flue gas, and simultaneously the waste gas in the drying section 111 is introduced to adjust the oxygen content, SO that the sintering production can be met, and the emission is reduced.
(6) The waste gas without the transition preheating section 113 enters a dust treatment system, the specification of the main pellet dust collector 16 is reduced, the occupied area, the investment and the operating cost of the main pellet dust collector 16 are reduced, the investment of an ash conveying system and secondary pollution caused by the ash conveying system are reduced, and the energy consumption of the system is reduced.
It is understood that the exhaust gas recycling system of the sintering-pelletizing process comprises a common flue gas purification device 408 and a common chimney 409, and the common flue gas purification device 408 is communicated with the flue gas outlet of the drying section 112 of the grate 11 and the flue gas outlet of the sintering machine 31. Specifically, the waste gas to be discharged in the pellet process is from the drying secondary section 112, and the flue gas in the drying secondary section 112 can sequentially enter the common flue gas purification equipment 408 and the common chimney 409 to be discharged after passing through the pellet main dust collector 16 and the pellet main exhaust fan 17; the waste gas to be discharged in the sintering process comes from a sintering machine, the gas flow on the surface of the mixture is increased under the action of the main sintering exhaust fan 24, so that the mixture layer is combusted from top to bottom, meanwhile, air passes through the material layer, is collected to the main flue 26 through the air box 251 and the air box branch pipe 252 after participating in sintering, and then sequentially enters the main sintering exhaust fan 27 and the main sintering exhaust fan 24 to sequentially enter the common flue gas purification equipment 408 and be discharged from the common chimney 409. Wherein, the flue gas purification equipment 408 is desulfurization and denitrification purification equipment. Specifically, the purification module of the flue gas purification device 408 can be set as required according to the difference of the materials, and is not described herein again.
The waste gas recycling system of the sintering-pelletizing process only uses one shared flue gas purification device 408 and one shared chimney 409, so that the number of the chimneys and the purification devices is reduced, the investment is reduced, and the occupied space is small.
In a preferred embodiment, the dust collector 42 is provided on any one or more of the first induced duct 401, the second induced duct 402, the third induced duct 403 and the fourth induced duct 404. The dust remover can remove dust to the gas that flows through, reduces impurity.
Preferably, the first cooling section 131 and the second cooling section 132 of the pellet circular cooler 13 are both connected with a variable frequency cooling fan, and the third induced air pipe 403 and/or the fourth induced air pipe 404 are correspondingly connected with the variable frequency cooling fan. The variable frequency fan can adjust the air inlet amount to realize the wind power adjustment of the pellet circular cooler 13, and the third air guiding pipe 403 and/or the fourth air guiding pipe 404 are/is correspondingly connected with the air inlet of the variable frequency cooling fan to realize circulation.
Optionally, in a specific example, the exhaust gas recycling system of the sintering-pelletizing process further includes a wind collecting pipe 405, one end of the wind collecting pipe 405 is communicated with the third wind guiding pipe 403 and the fourth wind guiding pipe 404, and the other end is communicated with the hot air hood 36 of the sintering machine. The air collecting duct 405 collects the recovered waste of the third air guiding duct 403 and the fourth air guiding duct 404, and guides the recycled waste to the hot air hood 36 of the sintering machine. Specifically, the air collecting pipe 405 is further provided with a dust collector 42, an exhaust fan 406 and an air mixing chamber 407.
The above is only the preferred embodiment of the present invention, and not the scope of the present invention, all the equivalent structures or equivalent flow changes made by the contents of the specification and the drawings or the direct or indirect application in other related technical fields are included in the patent protection scope of the present invention.
Claims (10)
1. A sintering-pelletizing technology waste gas cyclic utilization system characterized by, includes:
the first air guiding pipe is connected between a transition preheating section of a chain grate in a pelletizing process and a hot air cover of a sintering machine in a sintering process and is used for guiding the flue gas of the transition preheating section out of the hot air cover of the sintering machine;
and the second induced air pipe is connected between the drying section of the chain grate and the hot air cover of the sintering machine and is used for guiding the flue gas of the drying section to the hot air cover of the sintering machine.
2. The sintering-pelletizing process waste gas recycling system of claim 1, further comprising:
the third induced draft pipe is connected between a flue gas outlet of the medium temperature section of the sintering circular cooler of the sintering process and the cooling section of the pellet circular cooler of the pellet process and is used for guiding the flue gas of the medium temperature section to the cooling section;
and the fourth induced draft pipe is connected between the flue gas outlet of the low-temperature section of the sintering circular cooler and the cooling second section of the pellet circular cooler and is used for guiding the flue gas of the low-temperature section to the cooling second section.
3. The sintering-pelletizing process waste gas recycling system of claim 2, characterized by further comprising a dust remover arranged on any one or more of the first induced air duct, the second induced air duct, the third induced air duct and the fourth induced air duct.
4. The sintering-pelletizing process waste gas recycling system of claim 2, wherein the first cooling section and the second cooling section of the pellet circular cooler are both connected with a variable frequency cooling fan, and the third air inducing pipe and/or the fourth air inducing pipe are correspondingly connected with the variable frequency cooling fan.
5. The system of claim 2, further comprising a wind collecting pipe, wherein one end of the wind collecting pipe is communicated with the third wind guiding pipe and the fourth wind guiding pipe, and the other end of the wind collecting pipe is communicated with the hot air hood of the sintering machine.
6. The sintering-pelletizing process waste gas recycling system of claim 5, characterized in that the air collecting pipe is further provided with a dust collector, an exhaust fan and an air mixing chamber.
7. The sintering-pelletizing process waste gas recycling system of claim 2, characterized in that the system further comprises a common flue gas purification device and a common chimney, wherein the common flue gas purification device is communicated with the flue gas outlet of the drying section of the grate and the flue gas outlet of the sintering machine.
8. The sintering-pelletizing process waste gas recycling system of claim 7, characterized in that a dust collector and an exhaust fan are further arranged between the flue gas outlet of the drying section and the common flue gas purification equipment.
9. A sinter-pelletizing system comprising a sintering machine and a sintering ring cooler for sintering processes, and a pellet ring cooler, a rotary kiln and a grate for pelletizing processes, characterized by further comprising an exhaust gas recycling system for sinter-pelletizing processes as claimed in any one of claims 1 to 8.
10. The sinter-pellet system as claimed in claim 9, wherein flue gas from the cooling section of the pellet ring cooler is introduced into the rotary kiln through a flue gas channel; the flue gas of the cooling second section is guided into the transition preheating section through an induced draft tube; the flue gas of the transition preheating section is guided into the drying second section through an induced draft pipe; and the flue gas in the high-temperature section of the sintering circular cooler is poured into a boiler for reutilization.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120073364.8U CN215002967U (en) | 2021-01-12 | 2021-01-12 | A sintering-pelletizing process waste gas recycling system and sintering-pelletizing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120073364.8U CN215002967U (en) | 2021-01-12 | 2021-01-12 | A sintering-pelletizing process waste gas recycling system and sintering-pelletizing system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215002967U true CN215002967U (en) | 2021-12-03 |
Family
ID=79140106
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120073364.8U Withdrawn - After Issue CN215002967U (en) | 2021-01-12 | 2021-01-12 | A sintering-pelletizing process waste gas recycling system and sintering-pelletizing system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215002967U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112728954A (en) * | 2021-01-12 | 2021-04-30 | 中冶长天国际工程有限责任公司 | Sintering-pelletizing technology waste gas cyclic utilization system and sintering-pelletizing system |
-
2021
- 2021-01-12 CN CN202120073364.8U patent/CN215002967U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112728954A (en) * | 2021-01-12 | 2021-04-30 | 中冶长天国际工程有限责任公司 | Sintering-pelletizing technology waste gas cyclic utilization system and sintering-pelletizing system |
| CN112728954B (en) * | 2021-01-12 | 2024-11-08 | 中冶长天国际工程有限责任公司 | A sintering-pelletizing process waste gas recycling system and a sintering-pelletizing system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6239779B2 (en) | Pollutant emission reduction process and system by classifying and collecting waste heat of sintered flue gas | |
| CN105509491B (en) | A kind of environmental protection and energy saving handling process for sintering flue gas | |
| CN101592443B (en) | Waste heat internal and external circulation comprehensive recycling method and hot air flow system of pellet production equipment | |
| CN113267053B (en) | System and method for producing cement clinker by using full-oxygen combustion circulation preheating | |
| CN104132550A (en) | Energy-saving environment-friendly sintering waste gas waste-heat utilization and pollutant purification process and system | |
| CN114413641B (en) | A pellet flue gas circulation and waste heat utilization process and its system | |
| CN116793097B (en) | Emission reduction method and emission reduction system for carbon monoxide in sintering flue gas | |
| CN206944178U (en) | A kind of smoke processing system | |
| CN108931141B (en) | A kind of technique for realizing inexpensive denitration using sinter waste-heat sintered discharge gas | |
| CN109539290A (en) | A kind of boiler slag afterheat utilizing system and technique | |
| CN107899413A (en) | A kind of exhaust gas of hot-blast stove desulphurization denitration cooperates with administering method | |
| CN105571338B (en) | A kind of system for the tail gas for handling rock wool board assembly line furnace cupola | |
| CN215002967U (en) | A sintering-pelletizing process waste gas recycling system and sintering-pelletizing system | |
| CN205425856U (en) | Cement kiln bypass joint fractional combustion kiln tail smoke treatment device that leaks informaton | |
| CN108645229A (en) | A kind of environmental protection and energy saving comprehensive processing technique of sintering flue gas | |
| CN112728954A (en) | Sintering-pelletizing technology waste gas cyclic utilization system and sintering-pelletizing system | |
| CN109269310B (en) | A sinter waste heat recovery device and method based on a vertical cold kiln | |
| CN115265182A (en) | Belt type roasting machine production line for classified cooling of pellets | |
| CN206094933U (en) | High -efficient waste heat utilization of oxide ore flash furnace tail gas and clean dust collecting system | |
| CN112880422A (en) | Environment-friendly bypass air discharging process and equipment without discharged gas | |
| CN213924953U (en) | Dry flue gas of concentrate system of recycling | |
| CN201508114U (en) | Pellet production equipment waste heat comprehensive recovery and utilization hot air flow system | |
| CN115682635A (en) | Drying process and system suitable for material containing high-content volatile VOC | |
| CN213932088U (en) | Waste gas recycling system of chain grate machine | |
| CN216878658U (en) | Denitration device based on chain grate rotary kiln |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20211203 Effective date of abandoning: 20241108 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20211203 Effective date of abandoning: 20241108 |