CN212205685U - Cement waste heat power generation coal mill drying air balance adjusting system - Google Patents
Cement waste heat power generation coal mill drying air balance adjusting system Download PDFInfo
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- CN212205685U CN212205685U CN202020764346.XU CN202020764346U CN212205685U CN 212205685 U CN212205685 U CN 212205685U CN 202020764346 U CN202020764346 U CN 202020764346U CN 212205685 U CN212205685 U CN 212205685U
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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Abstract
The utility model discloses a cement waste heat power generation coal mill dry air balance adjusting system, including the cold machine of comb and exhaust-heat boiler, the cold machine of comb communicates with exhaust-heat boiler, and the cold machine of comb includes a plurality of air outlets, and a plurality of air outlets include first air outlet and second air outlet at least, and exhaust-heat boiler includes air intake and air outlet, and the first air outlet of the cold machine of comb communicates with exhaust-heat boiler's air intake through the exhaust-heat tuber pipe, and the second air outlet of the cold machine of comb is connected with the coal mill through the dry tuber pipe of coal mill, and exhaust-heat boiler's air outlet communicates with the dust; the coal mill drying air pipe is connected with the waste heat air pipe through the coal mill balancing air pipe, and the coal mill balancing air pipe controls the communication of the waste heat air pipe and the coal mill drying air pipe. The utility model discloses make coal mill dry air temperature can adjust comparatively accurately for can continue to maintain the air valve opening during raw coal moisture changes, reduce the air loss, the energy saving promotes the environmental protection.
Description
Technical Field
The utility model particularly relates to a cement waste heat power generation technical field specifically is cement waste heat power generation coal grinds dry wind balance governing system.
Background
The existing coal mill drying air system for cement waste heat power generation is shown in fig. 1 and comprises a cooling fan 2, a grate cooler 1 and a waste heat boiler 3 which are connected in sequence. The grate cooler 1 is provided with a first air outlet 12, a second air outlet 13 and a third air outlet 14, and the exhaust-heat boiler 3 is provided with an air inlet 15 and an air outlet 16. The air is pressurized by the cooling fan 2 to form cooling air which is sent into the grate cooler 1 for cooling the cement clinker, and the air is heated by the high-temperature cement clinker to be hot air and then is discharged through the air outlet 16 respectively. High-temperature hot air enters the waste heat boiler 3 to heat water into steam to provide power steam for the waste heat power generation steam turbine, medium-temperature hot air enters the coal mill to provide drying heat for the coal mill, and the low-temperature hot air is discharged from a chimney after a dust remover.
The grate cooler 1 for cooling the cement clinker supplies hot air to the coal mill and the waste heat boiler at the same time, and the air quantity and the air temperature are generally controlled by adjusting the opening of a waste air valve.
Due to the equipment characteristics of the grate cooler, the air quantity and the heat quantity entering the coal mill are not easy to adjust, and according to operation statistics, when the opening of the waste air valve is 20-30%, the heat quantity entering the coal mill can meet the drying requirement of raw coal. However, when the moisture of the raw coal is increased, the drying heat demand of the coal mill is increased, and at the moment, the opening degree of the surplus air valve needs to be increased, so that the temperature field in the grate cooler is adjusted, the high-temperature area moves towards the third air outlet, the drying air temperature of the coal mill is further increased, and meanwhile, the air temperature of the surplus air pipe can be increased accordingly, heat energy waste is caused, and the surplus heat generating capacity is influenced.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a cement waste heat power generation coal grinds dry wind balance governing system to solve the problem that proposes in the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme:
the dry air balance adjusting system for the cement waste heat power generation coal mill comprises a grate cooler and a waste heat boiler, wherein the grate cooler is communicated with the waste heat boiler, the grate cooler comprises a plurality of air outlets, the air outlets at least comprise a first air outlet and a second air outlet, the waste heat boiler comprises an air inlet and an air outlet, the first air outlet of the grate cooler is communicated with the air inlet of the waste heat boiler through a waste heat air pipe, the second air outlet of the grate cooler is connected with the coal mill through a coal mill drying air pipe, and the air outlet of the waste heat boiler is communicated with the air inlet of a dust remover; wherein, still include the balanced tuber pipe of coal mill, the waste heat tuber pipe pass through the balanced tuber pipe of coal mill with the dry tuber pipe of coal mill is connected, the intercommunication of the balanced tuber pipe control waste heat tuber pipe of coal mill and the dry tuber pipe of coal mill, the system still includes the dry wind switching air door of coal mill and the dry wind adjusting air door of coal mill, and the dry wind adjusting air door setting of coal mill is on the balanced tuber pipe of coal mill, the dry wind switching air door of coal mill is located the junction of the second air outlet of grate cooler and the dry tuber pipe of coal mill.
As a further aspect of the present invention: and the coal mill drying air switching air door is positioned between the second air outlet and the coal mill balance air pipe.
As a further aspect of the present invention: the system also comprises a cooling fan, wherein the cooling fan is arranged outside the grate cooler and is used for providing cooling air for the grate cooler.
As a further aspect of the present invention: the grate cooler also comprises a third air outlet, the third air outlet of the grate cooler is connected with the air inlet of the dust remover through a waste air pipe, and the air outlet of the waste heat boiler is communicated with the waste air pipe through an air outlet pipe.
As a further aspect of the present invention: and the residual air pipe is provided with a residual air valve capable of adjusting air quantity.
As a further aspect of the present invention: an air outlet valve capable of adjusting air quantity is arranged on the air outlet pipe.
Compared with the prior art, the beneficial effects of the utility model are that: because the utility model discloses a set up balanced tuber pipe at the surplus hot-blast main and provide the supplementary hot-blast for coal grinds dry air, consequently for coal grinds dry air temperature can adjust comparatively accurately, can continue to maintain the surplus air valve opening during the change of raw coal moisture, reduces the surplus air loss, and the energy saving promotes the environmental protection.
Drawings
Fig. 1 is a schematic structural diagram of a conventional coal mill drying air system.
Fig. 2 is the utility model discloses a cement waste heat power generation coal grinds dry wind balance governing system's structural schematic.
In the figure: 1-grate cooler, 2-cooling fan, 3-waste heat boiler, 4-waste air valve, 5-waste heat air pipe, 6-coal mill drying air pipe, 7-air outlet pipe, 8-waste air pipe, 9-dust remover air inlet, 10-coal mill balance air pipe, 11-coal mill drying air adjusting air door, 12-first air outlet, 13-second air outlet, 14-third air outlet, 15-air inlet, 16-air outlet and 17-coal mill drying air switching air door.
Detailed Description
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 work belong to the protection scope of the present invention.
Referring to fig. 2, in the embodiment of the present invention, a balance adjusting system for dry air of a cement waste heat power generation coal mill includes a grate cooler 1, a cooling fan 2, and a waste heat boiler 3, wherein the grate cooler 1 is communicated with the waste heat boiler 3, and the cooling fan 2 is disposed outside the grate cooler 1 and provides cooling air to the grate cooler 1.
The grate cooler 1 is provided with 3 air outlets, namely a first air outlet 12, a second air outlet 13 and a third air outlet 14, and the exhaust-heat boiler 3 is provided with an air inlet 15 and an air outlet 16. The first air outlet 12 of the grate cooler 1 is communicated with the air inlet 15 of the waste heat boiler 3 through the waste heat air pipe 5 to provide a heat source for heating water vapor for the waste heat boiler 3; the second air outlet 13 of the grate cooler 1 is connected with the coal mill through a coal mill drying air pipe 6 to provide heat required by raw coal drying for the coal mill; the third air outlet 14 of the grate cooler 1 is connected with the air inlet 9 of the dust remover through the residual air pipe 8, the residual low-temperature air is sent into the dust remover and then discharged through a chimney, and the residual air pipe 8 is also provided with a residual air valve 4 capable of adjusting the air quantity. An air outlet 16 of the waste heat boiler 3 is connected with an air inlet 9 of the dust remover after being communicated with the waste air pipe 8 through an air outlet pipe 7, and the air outlet pipe 7 is further provided with an air outlet valve which is used for controlling whether the air outlet pipe 7 is communicated with the waste air pipe 8 or not and controlling the air quantity entering the waste air pipe 8.
The adjusting system further comprises a coal mill balance air pipe 10, and the waste heat air pipe 5 is communicated with a coal mill drying air pipe 6 through the coal mill balance air pipe 10 to provide supplementary heat for drying the coal mill. The coal mill balance air pipe 10 is also provided with a coal mill dry air adjusting air door 11, the coal mill dry air pipe 6 is also provided with a coal mill dry air switching air door 17, the coal mill dry air switching air door 17 is positioned at the joint of the second air outlet 13 of the grate cooler 1 and the coal mill dry air pipe 6, and further, the coal mill dry air switching air door 17 is positioned between the second air outlet 13 and the coal mill balance air pipe 10.
The utility model discloses a theory of operation is:
the outside air is pressurized by the cooling fan 2 to form cooling air which is sent into the grate cooler 1 and used for cooling the high-temperature cement clinker, and the cooling air is heated by the high-temperature cement clinker to be hot air and then is discharged through a plurality of air outlets of the grate cooler 1. High-temperature hot air enters the waste heat boiler 3 from the first air outlet 12 through the waste heat air pipe 5, heats water to form steam, and provides power steam for the waste heat power generation steam turbine. The medium-temperature hot air enters the coal mill from the second air outlet 13 through the coal mill drying air pipe 6 to provide drying heat for the coal mill. And the low-temperature hot air enters the dust remover from the third air outlet 14 through the residual air pipe 8 and is discharged from a chimney.
When the moisture of the raw material coal is not high or the waste heat boiler 3 is stopped, the drying air adjusting air door 11 of the coal mill balance air pipe 10 can be completely closed, at the moment, the waste heat air pipe 5 and the coal mill drying air pipe 6 are not communicated, the two air pipes are independent from each other, and the medium-temperature hot air is discharged only through the second air outlet 13 of the grate cooler 1 to provide drying heat for the coal mill; when the moisture of the raw material coal is high or in rainy season, the coal mill drying air switching air door 17 of the coal mill drying air pipe 6 is closed, at the moment, hot air formed by heating high-temperature cement clinker cannot pass through the second air outlet 13 of the grate cooler 1 to discharge medium-temperature hot air to provide drying heat for the coal mill, at the moment, the drying air adjusting air door 11 on the coal mill balancing air pipe 10 is opened, high-temperature hot air formed by heating high-temperature cement clinker can pass through the first air outlet 13 of the grate cooler 1, the high-temperature hot air passes through the waste heat air pipe 5 and the coal mill balancing air pipe 10 to provide drying heat for the coal mill, and partial high-temperature hot air enters the coal mill through the coal mill balancing air pipe 10 by adjusting the opening degree of the drying air adjusting air door 11 to meet the drying requirement. Meanwhile, the opening degree of the waste air valve 4 does not need to be adjusted, so that the waste air heat loss is effectively reduced, the generated energy is increased, and the energy conservation and environmental protection are promoted.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (6)
1. The system for adjusting the balance of the drying air of the cement waste heat power generation coal mill comprises a grate cooler and a waste heat boiler and is characterized in that the grate cooler is communicated with the waste heat boiler, the grate cooler comprises a plurality of air outlets, the plurality of air outlets at least comprise a first air outlet and a second air outlet, the waste heat boiler comprises an air inlet and an air outlet, the first air outlet of the grate cooler is communicated with the air inlet of the waste heat boiler through a waste heat air pipe, the second air outlet of the grate cooler is connected with the coal mill through a coal mill drying air pipe, and the air outlet of the waste heat boiler is communicated with the air inlet of a dust remover; wherein, still include the balanced tuber pipe of coal mill, the waste heat tuber pipe pass through the balanced tuber pipe of coal mill with the dry tuber pipe of coal mill is connected, the intercommunication of the balanced tuber pipe control waste heat tuber pipe of coal mill and the dry tuber pipe of coal mill, the system still includes dry wind damper of coal mill and the dry wind switching air door of coal mill, and dry wind damper of coal mill sets up on the balanced tuber pipe of coal mill, dry wind switching air door of coal mill is located the junction of the second air outlet of grate cooler and the dry tuber pipe of coal mill.
2. The system of claim 1, wherein the coal mill drying air switching damper is located between the second air outlet and the coal mill balancing air duct.
3. The system for adjusting the balance of the drying air of the cement waste heat power generation coal mill according to claim 1, characterized by further comprising a cooling fan, wherein the cooling fan is arranged outside the grate cooler and provides cooling air for the grate cooler.
4. The system for adjusting the balance of the drying air of the cement waste heat power generation coal mill according to claim 1, wherein the grate cooler further comprises a third air outlet, the third air outlet of the grate cooler is connected with the air inlet of the dust remover through a waste air pipe, and the air outlet of the waste heat boiler is communicated with the waste air pipe through an air outlet pipe.
5. The cement waste heat power generation coal mill drying air balance adjusting system according to claim 4, wherein an air flow adjustable air valve is arranged on the exhaust pipe.
6. The system for adjusting the balance of the drying air of the cement waste heat power generation coal mill according to claim 4, wherein an air outlet valve capable of adjusting air volume is arranged on the air outlet pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020764346.XU CN212205685U (en) | 2020-05-09 | 2020-05-09 | Cement waste heat power generation coal mill drying air balance adjusting system |
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| CN202020764346.XU CN212205685U (en) | 2020-05-09 | 2020-05-09 | Cement waste heat power generation coal mill drying air balance adjusting system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112679121A (en) * | 2020-12-28 | 2021-04-20 | 安徽海螺集团有限责任公司 | Cement clinker production line with low emission and low energy consumption |
| CN114993060A (en) * | 2022-05-27 | 2022-09-02 | 中国中材国际工程股份有限公司 | Kiln head waste heat energy-saving utilization and safe production system |
-
2020
- 2020-05-09 CN CN202020764346.XU patent/CN212205685U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112679121A (en) * | 2020-12-28 | 2021-04-20 | 安徽海螺集团有限责任公司 | Cement clinker production line with low emission and low energy consumption |
| CN114993060A (en) * | 2022-05-27 | 2022-09-02 | 中国中材国际工程股份有限公司 | Kiln head waste heat energy-saving utilization and safe production system |
| CN114993060B (en) * | 2022-05-27 | 2024-01-19 | 中国中材国际工程股份有限公司 | Kiln head waste heat energy-saving utilization and safety production system |
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