CN219829530U - Cement kiln head boiler waste gas waste heat utilization and standby cooling system - Google Patents
Cement kiln head boiler waste gas waste heat utilization and standby cooling system Download PDFInfo
- Publication number
- CN219829530U CN219829530U CN202321201957.3U CN202321201957U CN219829530U CN 219829530 U CN219829530 U CN 219829530U CN 202321201957 U CN202321201957 U CN 202321201957U CN 219829530 U CN219829530 U CN 219829530U
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- China
- Prior art keywords
- kiln head
- heat exchanger
- boiler
- tubular heat
- grate cooler
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- 239000002912 waste gas Substances 0.000 title claims abstract description 36
- 239000002918 waste heat Substances 0.000 title claims abstract description 35
- 239000004568 cement Substances 0.000 title claims abstract description 24
- 238000001816 cooling Methods 0.000 title claims abstract description 19
- 239000000428 dust Substances 0.000 claims description 23
- 239000000779 smoke Substances 0.000 claims description 22
- 238000000605 extraction Methods 0.000 claims description 6
- 238000007664 blowing Methods 0.000 claims 1
- 238000010248 power generation Methods 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 description 7
- 239000007789 gas Substances 0.000 description 5
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 4
- 239000003546 flue gas Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
Landscapes
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The utility model discloses a cement kiln head boiler waste gas waste heat utilization and standby cooling system which comprises a grate cooler, a kiln head settling chamber, a kiln head boiler and a tubular heat exchanger, wherein the kiln head boiler is communicated with the grate cooler through the kiln head settling chamber, and the grate cooler is positioned at the bottom air inlet of the grate cooler. The kiln head boiler is communicated with the air inlet of the tubular heat exchanger, and a boiler outlet valve is arranged in a pipeline between the kiln head boiler and the tubular heat exchanger. The utility model relates to the technical field of cement waste heat power generation, in particular to a cement kiln head boiler waste gas waste heat utilization and standby cooling system. The indirect heat exchange mode of the tubular heat exchanger is adopted, waste gas at the outlet of the waste heat boiler at about 100 ℃ is recycled again, the formed waste heat waste gas is introduced into the grate cooler, and the inlet air temperature of the grate cooler can be increased by about 20-40 ℃ on the basis of normal temperature, so that the waste gas temperature of the grate cooler is increased, and the generated energy of waste heat power generation is increased.
Description
Technical Field
The utility model relates to the technical field of cement waste heat power generation, in particular to a cement kiln head boiler waste gas waste heat utilization and standby cooling system.
Background
The existing cement kiln waste heat power generation system has two defects: firstly, after the waste heat of the waste gas extracted from the middle part of the grate cooler is utilized by a waste heat boiler, the temperature of the discharged waste gas is still more than 100 ℃, and the waste gas has further utilization value. Secondly, the normal production of the cement kiln can be influenced by the failure shutdown of the waste heat boiler. Because the kiln head adopts the kiln head dust collector, the inlet temperature of the kiln head dust collector is required to be not higher than 200 ℃. If the kiln head waste heat boiler is abnormal or the boiler is stopped, the inlet temperature of the kiln head dust collector can reach 400 ℃, which can seriously affect the normal production of the cement kiln and even lead to the stop of the production.
Disclosure of Invention
(one) solving the technical problems
Aiming at the defects of the prior art, the utility model provides a cement kiln head boiler waste gas waste heat utilization and standby cooling system, which solves the problems that the existing cement kiln waste heat power generation system has low heat energy utilization rate and the normal production of a cement kiln can be influenced by the failure shutdown of a waste heat boiler.
(II) technical scheme
In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a cement kiln head boiler waste gas waste heat utilization and reserve cooling system, includes lower fan of comb, comb cooler, kiln head settling chamber, kiln head boiler and tubular heat exchanger, the kiln head boiler passes through kiln head settling chamber and comb cooler intercommunication, and lower fan of comb is located the bottom air intake position of comb cooler.
The kiln head boiler is communicated with the air inlet of the tubular heat exchanger, and a boiler outlet valve is arranged in a pipeline between the kiln head boiler and the tubular heat exchanger.
The grate cooler is communicated with an air inlet of the tubular heat exchanger, and a smoke air bypass valve and a smoke air bypass temperature detector are arranged in the pipelines of the grate cooler and the tubular heat exchanger.
The tubular heat exchanger is communicated with the grate lower fan, and a heat extraction valve is arranged in a pipeline between the tubular heat exchanger and the grate lower fan.
One side of the tube heat exchanger is provided with an air cooler which can blow cold air into the tube heat exchanger.
An air outlet of the tubular heat exchanger is communicated with the kiln head dust collector, a flue gas temperature detector at an inlet of the dust collector is arranged in a pipeline between the air outlet of the tubular heat exchanger and the kiln head dust collector, and the kiln head dust collector is communicated with a chimney.
As a further preference, the air inlet of the tubular heat exchanger is provided with a sprayer.
As a further preferable mode, a boiler inlet smoke valve and an inlet smoke temperature detector are arranged in the pipeline of the kiln head settling chamber and the grate cooler.
(III) beneficial effects
The utility model provides a cement kiln head boiler waste gas waste heat utilization and standby cooling system. The beneficial effects are as follows:
the cement kiln head boiler waste gas waste heat utilization and standby cooling system is provided with a waste gas waste heat secondary utilization system. The indirect heat exchange mode of the tubular heat exchanger is adopted, waste gas at the outlet of the waste heat boiler at about 100 ℃ is recycled again, the formed waste heat waste gas is introduced into the grate cooler, and the inlet air temperature of the grate cooler can be increased by about 20-40 ℃ on the basis of normal temperature, so that the waste gas temperature of the grate cooler is increased, and the generated energy of waste heat power generation is increased; cooling through the tubular heat exchanger, and starting an air cooler or cold water to forcedly cool the tubular heat exchanger. And simultaneously, the heat exhausting valve can be opened to exhaust superfluous heat. Thereby ensuring that the temperature of the flue gas does not exceed the safe operation temperature of the kiln head dust collector and ensuring the normal production of the cement kiln.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model.
In the figure: 1. a grate lower fan; 2. a grate cooler; 3. a kiln head settling chamber; 4. a kiln head boiler; 5. a tubular heat exchanger; 6. an air cooler; 7. a kiln head dust collector; 8. a chimney; 9. a sprayer; 10. a boiler inlet smoke valve; 11. an inlet flue gas temperature detector; 12. a smoke bypass valve; 13. a smoke bypass temperature detector; 14. a boiler outlet valve; 15. a dust collector inlet smoke temperature detector; 16. a heat rejection valve.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
As shown in fig. 1, the present utility model provides a technical solution: the utility model provides a cement kiln head boiler waste gas waste heat utilization and reserve cooling system, includes that the fan is 1 under the comb, comb cold machine 2, kiln head settling chamber 3, kiln head boiler 4 and tubular heat exchanger 5, kiln head boiler 4 is through kiln head settling chamber 3 and comb cold machine 2 intercommunication, is provided with boiler import smoke air valve 10 and import smoke air temperature detector 11 in the pipeline of kiln head settling chamber 3 and comb cold machine 2, and the fan is 1 under the comb is located the bottom air intake position of comb cold machine 2.
The kiln head boiler 4 is communicated with the air inlet of the tubular heat exchanger 5, and a boiler outlet valve 14 is arranged in a pipeline between the kiln head boiler 4 and the tubular heat exchanger 5.
The tubular heat exchanger 5 is composed of: mainly comprises a shell, a heat transfer tube bundle, a tube plate, a baffle plate (baffle plate), an air inlet, an air outlet and the like. The casing is the cuboid, and the inside is equipped with many tube bundles, and tube bundle both ends are fixed on the tube sheet. The cold and hot fluids for heat exchange flow inside and outside the tube bundle respectively, the hot flue gas flows inside the tube bundle, and the cold air flows outside the tubes.
The grate cooler 2 is communicated with an air inlet of the tubular heat exchanger 5, and a smoke air bypass valve 12 and a smoke air bypass temperature detector 13 are arranged in the pipelines of the grate cooler 2 and the tubular heat exchanger 5.
The tubular heat exchanger 5 is communicated with the underframe fan 1, a heat extraction valve 16 is arranged in a pipeline between the tubular heat exchanger 5 and the underframe fan 1, the heat extraction valve 16 is opened, and the waste gas with heat after heat exchange is input into the underframe fan 1.
One side of the tube heat exchanger 5 is provided with an air cooler 6 into which cold air can be blown.
The air inlet of the tubular heat exchanger 5 is provided with a sprayer 9, and the sprayer 9 is a common sprayer.
When the boiler does not work normally or stops running, the exhaust gas inlet valve of the kiln head boiler 4 is closed, high-temperature exhaust gas discharged by the grate cooler 2 completely enters the pipeline of the tubular heat exchanger 5 through the smoke bypass valve 12, and the generated redundant exhaust gas can be discharged through the heat extraction valve through the air cooler 6 or water cooling. An inlet pipeline of the kiln head dust collector 7 is provided with a forced cooling valve which can be doped with cold air, and cooled waste gas enters the kiln head dust collector 7.
The air outlet of the tubular heat exchanger 5 is communicated with the kiln head dust collector 7, and a dust collector inlet smoke temperature detector 15 is arranged in a pipeline between the air outlet of the tubular heat exchanger 5 and the kiln head dust collector 7, and the kiln head dust collector 7 is communicated with a chimney 8.
And all that is not described in detail in this specification is well known to those skilled in the art.
When the grate cooler is used, high-temperature waste gas discharged by the grate cooler 2 enters the kiln head settling chamber 3 through the boiler inlet smoke valve 10, the waste gas is settled and then is input into the kiln head boiler 4, heat is supplied to the kiln head boiler 4, then the waste gas (higher than 100 ℃) enters the tubular heat exchanger 5 by opening the boiler outlet valve 14, and in addition, redundant high-temperature waste gas of the grate cooler 2 can be directly discharged into the tubular heat exchanger 5 through the smoke bypass valve 12. The hot air generated by heat exchange on the inner surface of the heat exchanger is sucked into the grate cooler 2 through the air inlet of the grate lower fan 1, so that the low-temperature waste gas can be reused.
The tubular heat exchanger 5 recycles the waste gas again, the heat extraction valve 16 is opened to introduce the waste heat and the waste gas into the grate cooler 2, and the air inlet temperature of the grate cooler 1 can be increased by about 20-40 ℃ on the basis of normal temperature, so that the waste gas temperature of the grate cooler 2 is increased.
In addition, the forced cooling of the tubular heat exchanger 5 can be performed by starting the air cooler 6 or by the sprayer 9, so that the temperature of the exhaust gas finally discharged from the outlet of the tubular heat exchanger 5 is reduced (in the past, the high-temperature gas discharged from the kiln head boiler 4 or directly from the grate cooler 2 is directly discharged into the kiln head dust collector 7, thereby seriously affecting the normal production of the cement kiln and even leading to the shutdown), and the safe operation temperature of the kiln head dust collector 7 is met.
In summary, the cement kiln head boiler waste gas waste heat utilization and standby cooling system is provided with the waste gas waste heat secondary utilization system. The indirect heat exchange mode of the tubular heat exchanger is adopted, waste gas at the outlet of the waste heat boiler at about 100 ℃ is recycled again, the formed waste heat waste gas is introduced into the grate cooler, and the inlet air temperature of the grate cooler can be increased by about 20-40 ℃ on the basis of normal temperature, so that the waste gas temperature of the grate cooler is increased, and the generated energy of waste heat power generation is increased; cooling through the tubular heat exchanger, and starting an air cooler or cold water to forcedly cool the tubular heat exchanger. And simultaneously, the heat exhausting valve can be opened to exhaust superfluous heat. Thereby ensuring that the temperature of the smoke does not exceed the safe operation temperature of the kiln head dust collector and ensuring the normal production of the cement kiln.
It should be noted that, the electrical components appearing in this document are all electrically connected to the external master controller and 220V or 380V mains supply, and the master controller may be a conventional known device for controlling a computer, etc., and the control principle, the internal structure, the control switching manner, etc. of the master controller are all conventional means in the prior art, and are directly cited herein, which are not repeated herein, and relational terms such as first and second, etc. are used solely to distinguish one entity or operation from another entity or operation, without necessarily requiring or implying any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (3)
1. A cement kiln head boiler waste gas waste heat utilization and reserve cooling system which is characterized in that: the device comprises a grate cooler (1), a grate cooler (2), a kiln head settling chamber (3), a kiln head boiler (4) and a tubular heat exchanger (5), wherein the kiln head boiler (4) is communicated with the grate cooler (2) through the kiln head settling chamber (3), and the grate cooler (1) is positioned at the bottom air inlet position of the grate cooler (2);
the kiln head boiler (4) is communicated with an air inlet of the tubular heat exchanger (5), and a boiler outlet valve (14) is arranged in a pipeline between the kiln head boiler (4) and the tubular heat exchanger (5);
the grate cooler (2) is communicated with an air inlet of the tubular heat exchanger (5), and a smoke air bypass valve (12) and a smoke air bypass temperature detector (13) are arranged in a pipeline between the grate cooler (2) and the tubular heat exchanger (5);
the tubular heat exchanger (5) is communicated with the grate lower fan (1), and a heat extraction valve (16) is arranged in a pipeline between the tubular heat exchanger (5) and the grate lower fan (1);
an air cooler (6) capable of blowing cold air into the tubular heat exchanger (5) is arranged at one side of the tubular heat exchanger;
an air outlet of the tubular heat exchanger (5) is communicated with the kiln head dust collector (7), a dust collector inlet smoke temperature detector (15) is arranged in a pipeline between the air outlet of the tubular heat exchanger (5) and the kiln head dust collector (7), and the kiln head dust collector (7) is communicated with a chimney (8).
2. The cement kiln head boiler waste heat utilization and standby cooling system according to claim 1, wherein: an air inlet of the tubular heat exchanger (5) is provided with a sprayer (9).
3. The cement kiln head boiler waste heat utilization and standby cooling system according to claim 1, wherein: and a boiler inlet smoke air valve (10) and an inlet smoke air temperature detector (11) are arranged in the pipelines of the kiln head settling chamber (3) and the grate cooler (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321201957.3U CN219829530U (en) | 2023-05-16 | 2023-05-16 | Cement kiln head boiler waste gas waste heat utilization and standby cooling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321201957.3U CN219829530U (en) | 2023-05-16 | 2023-05-16 | Cement kiln head boiler waste gas waste heat utilization and standby cooling system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219829530U true CN219829530U (en) | 2023-10-13 |
Family
ID=88276052
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321201957.3U Active CN219829530U (en) | 2023-05-16 | 2023-05-16 | Cement kiln head boiler waste gas waste heat utilization and standby cooling system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219829530U (en) |
-
2023
- 2023-05-16 CN CN202321201957.3U patent/CN219829530U/en active Active
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