CN212645389U - Preheating device with high-temperature bag dust collection function - Google Patents
Preheating device with high-temperature bag dust collection function Download PDFInfo
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- CN212645389U CN212645389U CN202021354668.3U CN202021354668U CN212645389U CN 212645389 U CN212645389 U CN 212645389U CN 202021354668 U CN202021354668 U CN 202021354668U CN 212645389 U CN212645389 U CN 212645389U
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Abstract
The utility model discloses a preheating device with high temperature bag gathers dust relates to cement manufacture technical field, solves the technical problem that exists among the background art, the utility model discloses a cold machine of comb, kiln hood cover, smoke chamber, dore furnace, humidifying tower, high temperature fan still including preheating the subassembly, cold machine of comb, kiln hood cover, smoke chamber, dore furnace and preheating the subassembly communicate in proper order, preheating subassembly, humidifying tower and high temperature fan communicate in proper order, high temperature fan and preheating still are equipped with exhaust-heat boiler between the subassembly, the utility model discloses a setting of subassembly is preheated to the one-level, and dust collection efficiency can be up to 99.999% (taking 2500t/d production line as an example, and the dust concentration who goes out this high temperature bag dust remover is 20mg/m3), and the flue gas dust that goes out the high temperature bag dust remover reaches current trade and discharges the index and can directly discharge.
Description
Technical Field
The utility model relates to a cement manufacture technical field, concretely relates to preheating device with high temperature bag gathers dust.
Background
The existing kiln tail pre-decomposition kiln adopts a five-stage cyclone preheater for gas-solid heat exchange (detailed as figure 1), and the working principle is as follows: raw materials entering the kiln (normal temperature) enter the equipment 1 (a C2-C1 air duct), the raw materials entering the kiln (kiln feed) carry out rapid heat exchange in the equipment 1, and enter the equipment 2(C1) under the action of a high-temperature fan to carry out gas-solid separation (a cyclone separation mode); raw materials (300 ℃) separated by gas and solid enter a C3-C2 air pipe through a device 4 (a C1 feeding pipe and an air locking valve), dust-containing (short for flying ash) gas (the dust content is 50-100 g/m3, the temperature is 360 ℃) separated out enters a humidifying tower or a waste heat boiler through a device 3 under the action of a high-temperature fan, finally enters a kiln tail bag dust remover for purification and standard treatment (the dust content of smoke is discharged after reaching the standard), and all flying ash collected by the device after the device 3 is conveyed by a conveying device and lifted by a lifter together with fresh raw materials to be used as raw materials entering the kiln to be fed into the device 1.
The dust (fly ash) concentration of the gas at the outlet of the C1 cyclone is high (the dust content is 50 g-100 g/m3), the temperature is high (300 ℃), so that the system has the following defects:
firstly, the fly ash at 300 ℃ takes away a large amount of heat (taking 2500t/d kiln tail decomposition kiln as an example, the heat consumption of the fly ash taking away heat is increased by about 12kcal/kg. cli compared with the unit clinker);
secondly, the density of the high-dust-containing gas of the C1 cyclone is higher than that of the clean gas, and the high-temperature fan does work greatly, namely the power consumption is high;
thirdly, fly ash (kiln dust) discharged from the C1 cyclone cylinder is easy to burn and has large enrichment amount of harmful ingredients compared with fresh raw materials, an existing production line has no independent kiln dust bin and is usually put into a kiln together with the fresh materials, the fluctuation of the material amount is large in the process of collecting or conveying the kiln dust, so that the ingredients of the raw material mixture finally entering the kiln are unstable, and the stability of a clinker calcining system and the quality of clinker are influenced;
fourthly, the gas with high dust concentration in the C1-outlet cyclone causes abrasion to the equipment 3, a humidifying tower or a waste heat boiler, a high-temperature fan, a kiln tail dust remover and a pipeline (an expansion joint and the like) for connecting the equipment with each other, and the service life of the equipment and the stable operation rate of the system are influenced; the fly ash (kiln dust) collected by subsequent equipment needs to be conveyed into the kiln again, and only 10kwh (calculated by taking 2500t/d as an example) of power consumption per hour is required to be increased when the fly ash (kiln dust) enters the kiln.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a: for solving the technical problem who exists among the background art, the utility model provides a preheating device with high temperature bag gathers dust.
The utility model discloses a realize above-mentioned purpose and specifically adopt following technical scheme:
the preheating device with the high-temperature bag dust collection function comprises a grate cooler, a kiln hood cover, a smoke chamber, a decomposing furnace, a humidifying tower and a high-temperature fan, and further comprises a preheating assembly, wherein the grate cooler, the kiln hood cover, the smoke chamber, the decomposing furnace and the preheating assembly are sequentially communicated, the preheating assembly, the humidifying tower and the high-temperature fan are sequentially communicated, and a waste heat boiler is further arranged between the high-temperature fan and the preheating assembly.
Further, the preheating assembly comprises a primary preheating assembly, a cyclone C2, a cyclone C3, a cyclone C4 and a cyclone C5, the primary preheating assembly is communicated with the humidifying tower through a second air pipe, the primary preheating assembly is communicated with the cyclone C2 through a first air pipe, the cyclone C2 is communicated with the cyclone C3 through an air pipe, the cyclone C3 is communicated with the cyclone C4 through an air pipe, the cyclone C4 is communicated with the cyclone C5 through an air pipe, and the cyclone C5 is communicated with the decomposing furnace through an air pipe.
Further, the cyclone C2 is communicated with an air pipe which is communicated with the cyclone C3 and the cyclone C4 through a pipeline, the cyclone C4 is communicated with the decomposing furnace through a pipeline, and the cyclone C5 is communicated with the smoke chamber through a pipeline.
Further, the primary preheating assembly comprises a high-temperature bag dust collector, and further comprises high-temperature pneumatic conveying equipment and gas transmission equipment which are arranged on the high-temperature bag dust collector and used for assisting dust transportation, wherein the high-temperature pneumatic conveying equipment is communicated with the cyclone cylinder C3 through a pipeline on which a valve is arranged.
The utility model discloses the during operation: the kiln raw material (normal temperature) enters an air pipe I (C2-an air pipe between the equipment 2 (a high-temperature bag dust remover)), the kiln raw material (kiln feed) is subjected to rapid heat exchange in the air pipe I, and enters the high-temperature bag dust remover to be subjected to gas-solid separation (a filter bag filtering mode) under the action of a high-temperature fan; raw materials (300 ℃) separated from gas and solid are conveyed by high-temperature pneumatic conveying equipment (air for conveying is provided by the pneumatic conveying equipment), air is locked by a valve to be discharged and enters C3-C2 air pipes, and separated dust-containing (fly ash for short) gas (the dust content is 20 mg/m)3And the temperature is 360 ℃ and enters a humidifying tower or a waste heat boiler through a second air pipe under the action of a high-temperature fan, and finally enters a raw material mill (when the raw material mill runs) or directly enters a chimney to be discharged into the atmosphere (when the raw material mill stops running).
The utility model discloses an utilize the principle that high temperature bag dust collector dust collection efficiency is higher than C1 cyclone dust collection efficiency to realize reducing the fly ash volume, realize from current C1 cyclone export high temperature flue gas dust concentration from 50 ~ 100g/m3Reduce to the high-temperature bag dust collector outlet dust concentration of 20mg/m that this patent utilized3。
The utility model has the advantages as follows:
the utility model discloses reduce kiln tail predecomposition system fly ash volume than current C1 whirlwind section of thick bamboo, for kiln outer predecomposition kiln grog calcining system realizes energy saving and emission reduction, mainly embody below:
firstly, the fly ash amount is reduced, the heat carried away by high-temperature fly ash can be reduced, the heat loss can be reduced by 12kcal/kgcli by being converted into unit clinker, and about 1500 tons of standard coal can be saved in 2500t/d production line year; the coal consumption for production can be reduced, the service life of vulnerable parts of a coal system, such as raw coal preparation, raw coal homogenization, coal powder preparation, coal powder conveying and the like, is prolonged, the running time of the coal system is reduced, and the power consumption of the system is reduced;
secondly, fly ash is reduced, work of the high-temperature fan is reduced, and power consumption of the high-temperature fan is reduced;
the smoke gas discharged from the system can be directly discharged, no kiln dust is generated, and no kiln dust is doped into the raw materials entering the kiln, so that the quality control of the raw material preparation is facilitated, and the stable operation of a clinker calcining system and the production of the clinker with stable quality are facilitated;
the flue gas discharged from the system can be directly discharged, a kiln dust conveying system is not needed, and compared with the existing C1 cyclone scheme, the power consumption can be saved by 10kwh (2500t/d production line) per hour;
directly discharging flue gas out of the system, and directly discharging waste gas after waste heat utilization and when the raw material mill is stopped; the kiln tail bag dust collector and the kiln tail waste gas exhaust fan (usually provided with a 630kw motor) of the existing C1 cyclone scheme can be started without starting (the raw material mill needs to be started during operation), so that the power consumption of the system can be reduced; after the waste heat is utilized when the raw material mill is operated, part of the flue gas enters the raw material mill for drying, the rest of the flue gas directly enters a chimney and is discharged into the atmosphere, the air quantity of a kiln tail dust collector to be treated is greatly reduced, the service life of wearing parts of the kiln tail dust collector can be prolonged, and the power consumption of a system is reduced.
Drawings
FIG. 1 is a schematic view of a gas-solid heat exchange structure of a conventional kiln tail predecomposition kiln adopting a five-stage cyclone preheater;
FIG. 2 is a schematic structural view of the present invention;
reference numerals: 1. a first air pipe; 2. a high-temperature bag dust remover; 3. high-temperature pneumatic conveying equipment; 4. a gas delivery device; 5. a valve; 6. a second air duct; 7. a grate cooler; 8. a kiln head cover; 9. a rotary kiln; 10. a smoking chamber; 11. a decomposing furnace; 12. cyclone C5; 13. cyclone C4; 14. cyclone C2; 15. cyclone C3; 16. a humidifying tower; 17. a high temperature fan.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. 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: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present invention, it should be noted that the terms "inside", "outside", "up", and the like indicate the directions or positional relationships based on the directions or positional relationships shown in the drawings, or the directions or positional relationships that the products of the present invention are conventionally placed when used, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element to which the term refers must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present invention.
Example 1
As shown in fig. 1, the preheating device with the high-temperature bag dust collection function comprises a grate cooler 7, a kiln hood 8, a smoke chamber 10, a decomposing furnace 11, a humidifying tower 16, a high-temperature fan 17 and a preheating assembly, wherein the grate cooler 7, the kiln hood 8, the smoke chamber 10, the decomposing furnace 11 and the preheating assembly are sequentially communicated, the preheating assembly, the humidifying tower 16 and the high-temperature fan 17 are sequentially communicated, and a waste heat boiler is further arranged between the high-temperature fan 17 and the preheating assembly.
Preferably, the preheating assembly comprises a primary preheating assembly, a cyclone C214, a cyclone C315, a cyclone C413 and a cyclone C512, the primary preheating assembly is communicated with the humidifying tower 16 through a second air pipe 6, the primary preheating assembly is communicated with the cyclone C214 through a first air pipe 1, the cyclone C214 is communicated with the cyclone C315 through an air pipe, the cyclone C315 is communicated with the cyclone C413 through an air pipe, the cyclone C413 is communicated with the cyclone C512 through an air pipe, and the cyclone C512 is communicated with the decomposing furnace 11 through an air pipe.
Preferably, the cyclone C214 is communicated with an air pipe for communicating the cyclone C315 with the cyclone C413 through a pipeline, the cyclone C413 is communicated with the decomposing furnace 11 through a pipeline, and the cyclone C512 is communicated with the smoke chamber 10 through a pipeline.
Preferably, the primary preheating assembly comprises a high-temperature bag dust collector 2, and further comprises high-temperature pneumatic conveying equipment 3 and gas conveying equipment 4 which are arranged on the high-temperature bag dust collector 2 and used for assisting dust transportation, wherein the high-temperature pneumatic conveying equipment 3 is communicated with the cyclone cylinder C315 through a pipeline on which a valve 5 is arranged.
The utility model discloses reduce kiln tail predecomposition system fly ash volume than current C1 whirlwind section of thick bamboo, for kiln outer predecomposition kiln grog calcining system realizes energy saving and emission reduction, mainly embody below:
firstly, the fly ash amount is reduced, the heat carried away by high-temperature fly ash can be reduced, the heat loss can be reduced by 12kcal/kgcli by being converted into unit clinker, and about 1500 tons of standard coal can be saved in 2500t/d production line year; the coal consumption for production can be reduced, the service life of vulnerable parts of a coal system, such as raw coal preparation, raw coal homogenization, coal powder preparation, coal powder conveying and the like, is prolonged, the running time of the coal system is reduced, and the power consumption of the system is reduced;
secondly, the fly ash is reduced, the work of the high-temperature fan 17 is reduced, and the power consumption of the high-temperature fan 17 is reduced;
the smoke gas discharged from the system can be directly discharged, no kiln dust is generated, and no kiln dust is doped into the raw materials entering the kiln, so that the quality control of the raw material preparation is facilitated, and the stable operation of a clinker calcining system and the production of the clinker with stable quality are facilitated;
the flue gas discharged from the system can be directly discharged, a kiln dust conveying system is not needed, and compared with the existing C1 cyclone scheme, the power consumption can be saved by 10kwh (2500t/d production line) per hour;
directly discharging flue gas out of the system, and directly discharging waste gas after waste heat utilization and when the raw material mill is stopped; the kiln tail bag dust collector and the kiln tail waste gas exhaust fan (usually provided with a 630kw motor) of the existing C1 cyclone scheme can be started without starting (the raw material mill needs to be started during operation), so that the power consumption of the system can be reduced; after the waste heat is utilized when the raw material mill is operated, part of the flue gas enters the raw material mill for drying, the rest of the flue gas directly enters a chimney and is discharged into the atmosphere, the air quantity of a kiln tail dust collector to be treated is greatly reduced, the service life of wearing parts of the kiln tail dust collector can be prolonged, and the power consumption of a system is reduced.
Claims (4)
1. Preheating device with high temperature bag gathers dust, including cold machine of combing a comb (7), kiln hood cover (8), smoke chamber (10), dore (11), humidifying tower (16), high temperature fan (17), its characterized in that still includes and preheats the subassembly, cold machine of combing a comb (7), kiln hood cover (8), smoke chamber (10), dore (11) and preheating the subassembly and communicate in proper order, preheat subassembly, humidifying tower (16) and high temperature fan (17) and communicate in proper order, high temperature fan (17) and preheat and still be equipped with exhaust-heat boiler between the subassembly.
2. The preheating device with the high-temperature bag dust collection function according to claim 1, wherein the preheating assembly comprises a primary preheating assembly, a cyclone C2(14), a cyclone C3(15), a cyclone C4(13) and a cyclone C5(12), the primary preheating assembly is communicated with a humidifying tower (16) through a second air duct (6), the primary preheating assembly is communicated with the cyclone C2(14) through a first air duct (1), the cyclone C2(14) is communicated with the cyclone C3(15) through an air duct, the cyclone C3(15) is communicated with the cyclone C4(13) through an air duct, the cyclone C4(13) is communicated with the cyclone C5(12) through an air duct, and the cyclone C5(12) is communicated with a decomposing furnace (11) through an air duct.
3. The preheating device with the high-temperature bag dust collection function according to claim 2, wherein the cyclone C2(14) is communicated with an air pipe for communicating the cyclone C3(15) with the cyclone C4(13) through a pipeline, the cyclone C4(13) is communicated with the decomposing furnace (11) through a pipeline, and the cyclone C5(12) is communicated with the smoke chamber (10) through a pipeline.
4. The preheating device with the high-temperature bag for collecting dust according to any one of claims 2 or 3, wherein the primary preheating assembly comprises a high-temperature bag dust collector (2), and further comprises high-temperature pneumatic conveying equipment (3) and gas conveying equipment (4) which are arranged on the high-temperature bag dust collector (2) and used for assisting dust transportation, and the high-temperature pneumatic conveying equipment (3) is communicated with a cyclone cylinder C3(15) through a pipeline on which a valve (5) is arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202021354668.3U CN212645389U (en) | 2020-07-11 | 2020-07-11 | Preheating device with high-temperature bag dust collection function |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021354668.3U CN212645389U (en) | 2020-07-11 | 2020-07-11 | Preheating device with high-temperature bag dust collection function |
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| CN212645389U true CN212645389U (en) | 2021-03-02 |
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| CN202021354668.3U Expired - Fee Related CN212645389U (en) | 2020-07-11 | 2020-07-11 | Preheating device with high-temperature bag dust collection function |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113200694A (en) * | 2021-05-26 | 2021-08-03 | 河南省豫鹤同力水泥有限公司 | Production process for reducing coal dilution and clinker heat consumption and improving coal powder heat value |
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2020
- 2020-07-11 CN CN202021354668.3U patent/CN212645389U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113200694A (en) * | 2021-05-26 | 2021-08-03 | 河南省豫鹤同力水泥有限公司 | Production process for reducing coal dilution and clinker heat consumption and improving coal powder heat value |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210302 Termination date: 20210711 |
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| CF01 | Termination of patent right due to non-payment of annual fee |