CN112944926A - Cement waste heat kiln head boiler power generation system - Google Patents
Cement waste heat kiln head boiler power generation system Download PDFInfo
- Publication number
- CN112944926A CN112944926A CN202110255353.6A CN202110255353A CN112944926A CN 112944926 A CN112944926 A CN 112944926A CN 202110255353 A CN202110255353 A CN 202110255353A CN 112944926 A CN112944926 A CN 112944926A
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- CN
- China
- Prior art keywords
- kiln head
- temperature hot
- pipe
- head boiler
- hot air
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000010248 power generation Methods 0.000 title claims abstract description 22
- 239000002918 waste heat Substances 0.000 title claims abstract description 20
- 239000004568 cement Substances 0.000 title claims abstract description 19
- 239000000779 smoke Substances 0.000 claims abstract description 10
- 239000000428 dust Substances 0.000 claims description 19
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 15
- 239000003546 flue gas Substances 0.000 claims description 15
- 238000001704 evaporation Methods 0.000 abstract description 6
- 230000008020 evaporation Effects 0.000 abstract description 6
- 239000003245 coal Substances 0.000 description 4
- 239000002912 waste gas Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 239000010431 corundum Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000012716 precipitator Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
- F27D2017/006—Systems for reclaiming waste heat using a boiler
-
- 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
Abstract
The invention discloses a cement waste heat kiln head boiler power generation system which comprises a rotary kiln, wherein the rotary kiln is connected with a grate cooler, a kiln head cover of the rotary kiln is provided with a high-temperature hot air pipe, the air outlet end of the high-temperature hot air pipe is connected with a kiln head boiler, one section of the grate cooler is provided with a medium-temperature hot air pipe, the two sections of the grate cooler are provided with low-temperature hot air pipes, the air outlet ends of the medium-temperature hot air pipe and the low-temperature hot air pipe are both communicated with an air inlet of the kiln head boiler, a hot air channel with high heat content is arranged on the rotary kiln, the air inlet temperature and the smoke air volume of the kiln head boiler can be effectively improved, the evaporation volume of the kiln head boiler is ensured, the power generation amount of the boiler is ensured, the.
Description
Technical Field
The invention relates to the technical field of cement waste heat power generation, in particular to a cement waste heat kiln head boiler power generation system.
Background
Cement clinker production enterprises basically belong to high energy consumption industries, consume a large amount of primary energy, and generate a large amount of high-heat waste gas and dust. The method is a key development direction of the cement industry for reducing energy consumption and environmental pollution, for example, a system for generating power by using cement waste heat can improve the economic benefits of enterprises and can also increase the social benefits.
At present, in a system for generating power by using cement waste heat, air is basically taken from an opening in the middle of a grate cooler, waste gas enters a kiln head waste heat boiler for heat exchange, power generation is carried out by using superheated steam, a low-temperature waste gas outlet after heat exchange of the kiln head waste heat boiler is connected to an outlet of a dust remover of an original cement line system for dust removal, and then the waste gas is discharged into the atmosphere through a chimney.
The existing kiln head boiler has the defects that the inlet temperature is low and cannot reach 380 ℃ of the design temperature of the boiler, so that the evaporation capacity of the kiln head boiler is low, the power generation load of a waste heat power generator set is low, the power generation capacity of the power generator set is continuously low, the operation efficiency is low, the power generation capacity per ton clinker is reduced, and the operation cost is high.
Disclosure of Invention
The invention aims to provide a cement waste heat kiln head boiler power generation system, which solves the problems that the existing kiln head boiler has lower inlet temperature and cannot reach the design temperature of the boiler body to be 380 ℃, so that the evaporation capacity of the kiln head boiler is lower, the power generation load of a waste heat generator set is low, the power generation amount of the generator set is continuously lower, the operation efficiency is lower, the per ton clinker power generation amount is reduced, and the operation cost is high.
In order to solve the technical problems, the invention adopts the following technical scheme:
the utility model provides a cement waste heat kiln head boiler power generation system, includes the rotary kiln, the rotary kiln is connected with the cold machine of comb, be equipped with the high temperature hot-blast main on the kiln hood cover of rotary kiln, the air-out end of high temperature hot-blast main is connected with the kiln head boiler, one section of the cold machine of comb is equipped with the warm-blast main in moderate temperature, two sections of the cold machine of comb are equipped with the low temperature hot-blast main, the warm-blast main in moderate temperature with the air-out end of low temperature hot-blast main all communicates.
The further technical scheme is that high-temperature flashboards for adjusting the air volume are arranged on the high-temperature hot air pipe, the medium-temperature hot air pipe and the low-temperature hot air pipe.
The further technical scheme is that a settler is arranged at an air inlet of the kiln head boiler through a connecting pipe, and an air inlet end of the settler is communicated with air outlet ends of the high-temperature hot-air pipe, the medium-temperature hot-air pipe and the low-temperature hot-air pipe.
According to a further technical scheme, ash discharge ports are formed in the bottom of the settler and the bottom of the kiln head boiler, ash discharge valves are arranged on the ash discharge ports, and the ash discharge ports are connected with zipper machines.
The further technical scheme is that a smoke air inlet of the grate cooler is connected with a first smoke pipe, an air outlet end of the first smoke pipe is connected with a dust remover, and an air outlet end of the dust remover is connected with an induced draft fan and a chimney.
The further technical scheme is that a second flue gas pipe is arranged at a flue gas inlet of the kiln head boiler, and an air outlet end of the second flue gas pipe is communicated with an air inlet end of the dust remover.
Compared with the prior art, the invention has the beneficial effects that:
the high-temperature hot air pipe is arranged on the rotary kiln, the hot air channel with high enthalpy is increased, the air inlet temperature and the smoke air volume of the kiln head boiler can be effectively improved, the evaporation capacity of the kiln head boiler is guaranteed, the generated energy of the boiler is guaranteed, the improvement of the temperature of the kiln head boiler is beneficial to operation and adjustment, the coal mill hot air temperature is improved, and the moisture of pulverized coal is reduced.
Drawings
FIG. 1 is a schematic view of the structure of the present invention.
In the figure: 1-rotary kiln, 2-grate cooler, 3-high temperature hot blast pipe, 4-kiln head boiler, 5-medium temperature hot blast pipe, 6-low temperature hot blast pipe, 7-high temperature flashboard, 8-connecting pipe, 9-settler, 10-ash discharge port, 11-zipper machine, 12-first flue gas pipe, 13-dust remover, 14-induced draft fan, 15-chimney and 16-second flue gas pipe.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, one embodiment of the present invention is:
the utility model provides a cement waste heat kiln head boiler power generation system, includes rotary kiln 1, rotary kiln 1 is connected with cold machine of comb 2, be equipped with high temperature hot-blast main 3 on the kiln hood of rotary kiln 1, the air-out end of high temperature hot-blast main 3 is connected with kiln head boiler 4, one section of cold machine of comb 2 is equipped with medium temperature hot-blast main 5, two-section of cold machine of comb 2 is equipped with low temperature hot-blast main 6, medium temperature hot-blast main 5 with the air-out end of low temperature hot-blast main 6 all communicates the air intake of kiln head boiler 4.
The high-temperature hot air pipe 3 is arranged on the rotary kiln 1, a hot air channel with high enthalpy is increased, the air inlet temperature and the smoke air volume of the kiln head boiler can be effectively improved, the evaporation capacity of the kiln head boiler is guaranteed, the generated energy of the boiler is ensured, the improvement of the temperature of the kiln head boiler is beneficial to operation and adjustment, the coal mill hot air temperature is improved, and the moisture of pulverized coal is reduced.
Specifically, the kiln head cover has high air intake temperature (over 1000 ℃), the high-temperature hot air pipe has high requirements on high temperature resistance and wear resistance, and the high-temperature flashboard for adjusting the air volume has the working requirement of over 1200 ℃. The high-temperature flashboard adopts a solid structure and is made of corundum castable; the expansion joint adopts a sleeve type expansion joint, high-temperature-resistant aluminum silicate fibers are filled in the expansion joint, and a sleeve structure is adopted in the outer part of the expansion joint and fine sand with good heat insulation property is filled in the expansion joint.
On the basis of the above-described embodiment:
and the high-temperature hot air pipe 3, the medium-temperature hot air pipe 5 and the low-temperature hot air pipe 6 are all provided with high-temperature flashboards 7 for adjusting the air volume.
The opening degree of the high-temperature flashboards 7 on the three pipelines is adjusted, so that the inlet temperature of the kiln head boiler can reach over 380 ℃ of the design, and the evaporation capacity of the kiln head boiler is guaranteed.
Because the kiln head cover of high temperature hot-blast main connection rotary kiln under the drawing wind of kiln head boiler, probably bring a large amount of fine particle material, consequently, incline the connecting portion slope of high temperature hot-blast main 3 and rotary kiln 1 and be greater than 45 to guarantee not to take place the circumstances that the material piles up.
On the basis of the above-described embodiment:
the air inlet of the kiln head boiler 1 is provided with a settler 9 through a connecting pipe 8, and the air inlet end of the settler 9 is communicated with the air outlet ends of the high-temperature hot-blast pipe 3, the medium-temperature hot-blast pipe 5 and the low-temperature hot-blast pipe 6.
The precipitator 9 is arranged in front of the kiln head boiler 1 to collect dust from high-temperature flue gas in the hot air pipe, so that the washing of smoke and dust to the heat exchange pipe in the kiln head boiler can be effectively reduced, and meanwhile, hot air is mixed in advance, and the balance of temperature entering the kiln head boiler is ensured.
On the basis of the above-described embodiment:
the bottom of the settler 9 and the bottom of the kiln head boiler 4 are both provided with an ash discharge port 10, the ash discharge port 10 is provided with an ash discharge valve, and the ash discharge port 10 is connected with a zipper machine 11.
The dust in the settler and the kiln head boiler can be discharged to the zipper machine through the dust discharge port 10, and is intensively treated after being discharged by the zipper machine, so that the pollution to the environment is reduced.
On the basis of the above-described embodiment:
the flue gas wind gap of the grate cooler 2 is connected with a first flue gas pipe 12, the air outlet end of the first flue gas pipe 12 is connected with a dust remover 13, and the air outlet of the dust remover 13 is connected with an induced draft fan 14 and a chimney 15.
And a second flue gas pipe 16 is arranged at a flue gas inlet of the kiln head boiler 4, and the air outlet end of the second flue gas pipe 16 is communicated with the air inlet end of the dust remover 13.
The dust remover 13 is matched with the induced draft fan 14 to be connected with the chimney 15, and dust of the grate cooler and the kiln head boiler 4 is collected and treated, so that environmental pollution is reduced.
Reference throughout this specification to various embodiments means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment described generally in this application. The appearances of the same phrase in various places in the specification are not necessarily all referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with any embodiment, it is submitted that it is within the scope of the invention to effect such feature, structure, or characteristic in connection with other embodiments.
While the foregoing is directed to the preferred embodiment of the present invention, it will be appreciated that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the scope and spirit of the principles of this disclosure. More specifically, various variations and modifications are possible in the component parts and/or arrangements of the subject combination arrangement within the scope of the disclosure, the drawings and the appended claims. In addition to variations and modifications in the component parts and/or arrangements, other uses will also be apparent to those skilled in the art.
Claims (6)
1. The utility model provides a cement waste heat kiln head boiler power generation system, includes rotary kiln (1), its characterized in that: the rotary kiln is characterized in that the rotary kiln (1) is connected with a grate cooler (2), a high-temperature hot air pipe (3) is arranged on a kiln head cover of the rotary kiln (1), an air outlet end of the high-temperature hot air pipe (3) is connected with a kiln head boiler (4), one section of the grate cooler (2) is provided with a medium-temperature hot air pipe (5), two sections of the grate cooler (2) are provided with low-temperature hot air pipes (6), and the medium-temperature hot air pipes (5) and the air outlet end of the low-temperature hot air pipe (6) are communicated with an air inlet of the kiln head boiler (4.
2. The cement waste heat kiln head boiler power generation system of claim 1, characterized in that: and the high-temperature hot air pipe (3), the medium-temperature hot air pipe (5) and the low-temperature hot air pipe (6) are respectively provided with a high-temperature flashboard (7) for adjusting the air volume.
3. The cement waste heat kiln head boiler power generation system of claim 1, characterized in that: an air inlet of the kiln head boiler (4) is provided with a settler (9) through a connecting pipe (8), and an air inlet end of the settler (9) is communicated with air outlet ends of the high-temperature hot-air pipe (3), the medium-temperature hot-air pipe (5) and the low-temperature hot-air pipe (6).
4. The cement waste heat kiln head boiler power generation system as claimed in claim 3, characterized in that: the bottom of the settler (9) and the bottom of the kiln head boiler (4) are both provided with ash discharge ports (10), the ash discharge ports (10) are provided with ash discharge valves, and the ash discharge ports (10) are connected with zipper machines (11).
5. The cement waste heat kiln head boiler power generation system of claim 1, characterized in that: the flue gas wind gap of grate cooler (2) is connected with first flue gas pipe (12), the air-out end of first flue gas pipe (12) is connected with dust remover (13), draught fan (14) and chimney (15) are connected to the air outlet of dust remover (13).
6. The cement waste heat kiln head boiler power generation system of claim 5, characterized in that: and a smoke air port of the kiln head boiler (4) is provided with a second smoke pipe (16), and an air outlet end of the second smoke pipe (16) is communicated with an air inlet end of the dust remover (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110255353.6A CN112944926A (en) | 2021-03-09 | 2021-03-09 | Cement waste heat kiln head boiler power generation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110255353.6A CN112944926A (en) | 2021-03-09 | 2021-03-09 | Cement waste heat kiln head boiler power generation system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112944926A true CN112944926A (en) | 2021-06-11 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110255353.6A Pending CN112944926A (en) | 2021-03-09 | 2021-03-09 | Cement waste heat kiln head boiler power generation system |
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| Country | Link |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH605447A5 (en) * | 1974-12-27 | 1978-09-29 | Fives Cail Babcock | |
| JP2001342044A (en) * | 2000-05-29 | 2001-12-11 | Taiheiyo Cement Corp | Lime firing furnace |
| CN101216254A (en) * | 2007-12-29 | 2008-07-09 | 中信重工机械股份有限公司 | Heating picking process for promoting cement kiln residual heat generating efficiency |
| CN201819571U (en) * | 2010-09-21 | 2011-05-04 | 广东开能环保能源有限公司 | Kiln head exhaust device for cement exhaust-heat power generation |
| CN210346364U (en) * | 2019-05-01 | 2020-04-17 | 伊犁天山水泥有限责任公司 | Improve cigarette wind pipe device of waste heat generated energy in cement production |
| CN111271980A (en) * | 2020-03-17 | 2020-06-12 | 天瑞新登郑州水泥有限公司 | Cement kiln waste heat power generation system |
| CN211695928U (en) * | 2020-02-26 | 2020-10-16 | 天瑞集团南召水泥有限公司 | Waste heat power generation efficiency improving device of cement kiln system |
-
2021
- 2021-03-09 CN CN202110255353.6A patent/CN112944926A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH605447A5 (en) * | 1974-12-27 | 1978-09-29 | Fives Cail Babcock | |
| JP2001342044A (en) * | 2000-05-29 | 2001-12-11 | Taiheiyo Cement Corp | Lime firing furnace |
| CN101216254A (en) * | 2007-12-29 | 2008-07-09 | 中信重工机械股份有限公司 | Heating picking process for promoting cement kiln residual heat generating efficiency |
| CN201819571U (en) * | 2010-09-21 | 2011-05-04 | 广东开能环保能源有限公司 | Kiln head exhaust device for cement exhaust-heat power generation |
| CN210346364U (en) * | 2019-05-01 | 2020-04-17 | 伊犁天山水泥有限责任公司 | Improve cigarette wind pipe device of waste heat generated energy in cement production |
| CN211695928U (en) * | 2020-02-26 | 2020-10-16 | 天瑞集团南召水泥有限公司 | Waste heat power generation efficiency improving device of cement kiln system |
| CN111271980A (en) * | 2020-03-17 | 2020-06-12 | 天瑞新登郑州水泥有限公司 | Cement kiln waste heat power generation system |
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Application publication date: 20210611 |