CN106931771B - Rotary kiln molybdenum oxide roasting system for supplying oxygen to bottom of material by utilizing waste heat - Google Patents
Rotary kiln molybdenum oxide roasting system for supplying oxygen to bottom of material by utilizing waste heat Download PDFInfo
- Publication number
- CN106931771B CN106931771B CN201710263344.5A CN201710263344A CN106931771B CN 106931771 B CN106931771 B CN 106931771B CN 201710263344 A CN201710263344 A CN 201710263344A CN 106931771 B CN106931771 B CN 106931771B
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- CN
- China
- Prior art keywords
- rotary kiln
- hot air
- annular bellows
- waste heat
- kiln
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
- F27B7/10—Rotary-drum furnaces, i.e. horizontal or slightly inclined internally heated, e.g. by means of passages in the wall
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G39/00—Compounds of molybdenum
- C01G39/02—Oxides; Hydroxides
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/02—Roasting processes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
- F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
- F27B7/22—Rotary drums; Supports therefor
- F27B7/24—Seals between rotary and stationary parts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
- F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
- F27B7/36—Arrangements of air or gas supply devices
- F27B7/362—Introducing gas into the drum axially or through the wall
-
- 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
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
- F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
- F27B7/36—Arrangements of air or gas supply devices
- F27B7/362—Introducing gas into the drum axially or through the wall
- F27B2007/365—Introducing gas into the drum axially or through the wall longitudinally
-
- 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
-
- 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
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
Abstract
One end of a hot air channel in the rotary kiln molybdenum oxide roasting system for supplying oxygen to the bottom of a material by utilizing waste heat is connected with the waste heat utilization system, and the other end of the hot air channel is used for introducing hot air in the hot air channel to the position right below the material in the rotary kiln by an oxygen supply device at the bottom of the material. The invention adopts the oxygen supply device for the bottom of the material, and directly introduces the hot air after heat exchange to the bottom of the material, and can ensure that the oxygen and the material are fully mixed due to continuous throwing of the material and continuous feeding of circulating hot air in the rotation process, so that the roasting effect is more perfect, the effect on molybdenum trioxide is particularly good, one-time roasting can be realized, the inconvenience caused by repeated roasting is avoided, and the structure of the material is changed from the roasting angle, so that the material has good effect on roasting of molybdenum dioxide, and the capacity ratio of the rotary kiln can be improved and the energy consumption can be reduced by adopting the scheme for molybdenum trioxide and molybdenum dioxide.
Description
Technical Field
The invention relates to the field of molybdenum oxide roasting, in particular to a rotary kiln molybdenum oxide roasting system for supplying oxygen to the bottom of a material by utilizing waste heat.
Background
The existing molybdenum oxide roasting technology cannot realize the success of one-time roasting of molybdenum trioxide, a reverberatory furnace is needed to carry out secondary roasting after primary roasting by a rotary kiln, the labor intensity is increased, a large amount of dust is generated in the operation process of personnel, pollution and waste are caused, and the yield is low.
Disclosure of Invention
The invention aims to solve the problem that the existing molybdenum trioxide needs to be roasted for a plurality of times because oxygen is positioned above a material and cannot be fully contacted with the material in the molybdenum oxide roasting technology, and provides a rotary kiln molybdenum oxide roasting system for supplying oxygen to the bottom of the material by utilizing waste heat.
The invention solves the technical problems, and adopts the following technical scheme:
the utility model provides a utilize waste heat to give rotary kiln molybdenum oxide roasting system of material bottom oxygen suppliment, including the rotary kiln, be provided with one section sealed hot air channel on the lateral wall of rotary kiln, the rotary kiln is from outer to interior including heat preservation, heat transfer layer and flame retardant coating in the usual circumstances once, generally form the heat transfer channel between heat preservation and flame retardant coating, the afterbody of heat transfer channel lets in the rotary kiln in, and the hot air channel in this application has changed traditional structure and has all sealed traditional hot air channel's both ends for hot-blast not in getting into the rotary kiln from the tip of rotary kiln, the one end of rotary kiln is provided with hot-blast furnace and kiln head case, the other end is provided with rotary kiln feed system and heat transfer kiln tail case, feed system generally includes rotary kiln feeder and feeding system, thereby guarantee to continue the feed, heat transfer kiln tail case is connected with waste heat utilization system, the one end of hot air channel pass through the hot air of bottom oxygen supply device in with hot-blast channel lets in the rotary kiln material under, and material bottom oxygen supply device sets up a plurality ofly at least, its position can fix the tip of rotary kiln, also can set up other positions of the rotary kiln.
The bottom oxygen supply device comprises an annular bellows and an air guide device, wherein the annular bellows comprises an inner wall made of an acid-base-resistant high-temperature-resistant breathable polymer film, a heat preservation layer and a baffle plate, the heat preservation layer and the baffle plate are sleeved on the outer side of the inner wall at intervals, the temperature of high-temperature gas after heat exchange is generally 400-550 ℃, so that the inner wall of the annular bellows adopts the acid-base-resistant high-temperature-resistant breathable polymer film, the high-temperature-resistant 1000 ℃ can be achieved by the polymer film, and molybdenum fine powder and molybdenum oxide cannot permeate into the annular bellows through the polymer film due to the characteristics of the polymer film. Baffle setting is around the annular bellows inner chamber that forms at the both ends cooperation inner wall of inner wall and heat preservation, be provided with a plurality of baffles that distribute along annular bellows axial in the annular bellows inner chamber and separate annular bellows inner chamber into a plurality of along its axial and mutually isolated cavitys, annular bellows is fixed and is constituted integral structure on the rotary kiln, the space that the inner wall of annular bellows surrounded has constituted a part of rotary kiln inner chamber, the air ducting is fixed in the faying face department of annular bellows and rotary kiln, the air ducting includes the fixed cover, sealing ring and rotation support, the fixed cover is supported on the mounting plane through rotating support and is realized sliding seal with the rotary kiln lateral wall, the sealing ring sets up the fixed cover of both sides cooperation and rotary kiln outer wall at the fixed cover and constitutes the wind-guiding passageway, the annular bellows sets up a plurality of passageways rather than the inner chamber intercommunication, be provided with the C-shaped groove on the one side of fixed cover and sealing ring contact, the C-shaped groove is located the vent that is provided with a plurality of equidistant subdivisions under the material on the sealing ring, the hot air in the passageway passes the C-shaped groove through the vent and enters the passageway, the passageway in with hot air in the annular bellows and let-in under the material.
The waste heat utilization system comprises a main fan, a dust collector, an adjustable radiator and a sedimentation heat exchanger which are connected in sequence; the sedimentation heat exchanger is connected with a heat exchange kiln tail box through a flue gas pipeline, the heat exchange kiln tail box is communicated with a hot air channel through the cooperation of a heat exchange air pipeline and an oxygen-enriched fan, and a rotary seal is arranged at the inlet of the hot air channel.
The fixed cover is provided with an opening at the position right above the material, the opening is communicated with at least one ventilation opening on the sealing ring, and the ventilation opening is communicated with the annular bellows through a channel to blow off the top material.
The included angle formed by connecting the two ends of the circular arc of the center line of the C-shaped groove with the center line of the circle where the C-shaped groove is positioned is 30-180 degrees, the length of the included angle is related to the size of the rotary kiln, the included angle is generally kept at 45-90 degrees, and the reference standard is not less than the length occupied by the materials on the circumference of the rotary kiln.
The beneficial effects of the invention are as follows: according to the invention, the bottom material oxygen supply device is adopted, hot air after heat exchange is directly introduced into the bottom of the material, the rotary kiln always rotates, and the material is continuously thrown onto the arc surface at the lower part of the rotary center of the rotary kiln in the rotating process, so that the annular air box is matched with the air guide device, the circulating hot air is always positioned under the material in the rotating process, the continuous supply of oxygen is ensured, the oxygen and the material can be fully mixed due to the continuous throwing of the material and the continuous supply of the circulating hot air in the rotating process, the roasting effect is more perfect, the effect of roasting molybdenum trioxide is particularly good, the completion of one-time roasting can be realized, the inconvenience caused by repeated roasting is avoided, and the structure is changed from the roasting angle of roasting, so that the good effect is also realized for roasting of molybdenum dioxide.
Drawings
Fig. 1 is a schematic diagram of the overall structure of the present invention.
Fig. 2 is an enlarged partial schematic view of the present invention at B in fig. 1.
Fig. 3 is a schematic view of the bottom oxygen supplying apparatus according to the present invention in an installed state.
Fig. 4 is a cross-sectional view taken along the direction A-A in fig. 3 in accordance with the present invention.
The graphic indicia: 1. hot blast stove; 2. a kiln head box; 3. a bottom oxygen supply device; 301. a fixed cover; 3011. a C-shaped groove; 302. a seal ring; 3021. a vent; 303. a rotary support; 304. a heat preservation layer; 305. an annular bellows; 306. an inner wall; 307. a baffle; 4. a rotary kiln; 5. a main fan; 6. a dust collector; 7. an adjustable heat sink; 8. a sedimentation heat exchanger; 9. a flue gas pipeline; 10. a heat exchange kiln tail box; 11. a feed system; 12. a heat exchange air pipeline; 13. an oxygen-enriched blower; 14. rotating and sealing; 15. a rotary kiln transmission device; 16. and a rotary kiln supporting device.
Detailed Description
The specific embodiments shown in the drawings are as follows:
the utility model provides a utilize waste heat to give rotary kiln molybdenum oxide calcination system of material bottom oxygen suppliment, includes rotary kiln 4, is provided with one section sealed hot-blast passage on the lateral wall of rotary kiln 4, and one end of rotary kiln is provided with hot-blast furnace 1 and kiln head case 2, and the other end is provided with rotary kiln feed system 11 and heat transfer kiln tail case 10, and heat transfer kiln tail case 10 is connected with waste heat utilization system, hot-blast passage's one end be connected with waste heat utilization system, the other end is through letting in the hot-blast under the material in rotary kiln 4 with the hot-blast in the hot-blast passage for material bottom oxygen suppliment device 3.
The bottom oxygen supply device 3 include annular bellows 305 and air ducting, annular bellows 305 includes the inner wall 306 of being made by acid-base resistant high temperature resistant ventilative polymer membrane, the heat preservation 304 and baffle 307 outside the inner wall 306 are established to the spacer sleeve, baffle 307 sets up the annular bellows 305 inner chamber that cooperates inner wall 306 and heat preservation 304 to surround the formation at the both ends of inner wall 306, be provided with a plurality of baffles that distribute along annular bellows 305 axial in the annular bellows 305 inner chamber and separate annular bellows 305 inner chamber into a plurality of along its axial and mutually isolated cavitys, annular bellows 305 fixes on rotary kiln 4 and constitutes integrated structure, annular bellows 305's inner wall surrounding space constitutes the part of rotary kiln 4 inner chamber, air ducting fixes in annular bellows 305 and rotary kiln 4's junction surface department, air ducting includes fixed cover 301, sealing ring 302 and rotation support 303, fixed cover 301 supports on the mounting plane through rotation support 303 and constitutes the sliding seal with rotary kiln 4 lateral wall, sealing ring 302 sets up the both sides cooperation fixed cover 301 and rotary kiln 4 outer wall and constitutes the wind-guiding passageway, annular bellows 305 sets up a plurality of and forms the passageway with its inner chamber intercommunication, fixed cover is provided with the C13 on the face and C groove 3011, the annular groove 3011 is located under the thermal ventilation mouth is arranged in the material is gone into under the annular groove 3011, the thermal ventilation mouth is put into the material under the thermal ventilation mouth 1, the material is put into the thermal ventilation mouth under the annular groove 3011 and is equal under the thermal ventilation mouth and the material is put into the thermal ventilation mouth under the material is put down under the annular groove 3011.
The waste heat utilization system comprises a main fan 5, a dust collector 6, an adjustable radiator 7 and a sedimentation heat exchanger 8 which are connected in sequence; the sedimentation heat exchanger 8 is connected with a heat exchange kiln tail box 10 through a flue gas pipeline 9, the heat exchange kiln tail box 10 is communicated with a hot air channel through the cooperation of a heat exchange air pipeline 12 and an oxygen enrichment fan 13, and a rotary seal 14 is arranged at the inlet of the hot air channel.
The fixed cover 301 is provided with an opening at the position right above the material, the opening is communicated with at least one ventilation opening on the sealing ring 302, and the ventilation opening is communicated with the annular bellows 305 through a channel to blow off the top material.
The included angle formed by connecting the two ends of the circular arc of the central line of the C-shaped groove 3011 with the circle center of the circle where the two ends are positioned is 60 degrees.
The technical scheme and the embodiment of the invention are not limited, and the technical scheme and the embodiment which are equivalent or have the same effect as those of the technical scheme and the embodiment of the invention are all within the protection scope of the invention.
Claims (3)
1. The utility model provides an utilize waste heat to give rotary kiln molybdenum oxide calcination system of material bottom oxygen suppliment, includes rotary kiln (4), is provided with one section sealed hot-blast channel on the lateral wall of rotary kiln (4), and the one end of rotary kiln is provided with hot-blast furnace (1) and kiln head case (2), and the other end is provided with rotary kiln feed system (11) and heat transfer kiln tail case (10), and heat transfer kiln tail case (10) are connected with waste heat utilization system, its characterized in that: one end of the hot air channel is connected with the waste heat utilization system, and the other end of the hot air channel is used for leading hot air in the hot air channel into the position right below the material in the rotary kiln (4) through an oxygen supply device (3) at the bottom of the material;
the oxygen supply device (3) at the bottom of the material comprises an annular bellows (305) and an air guide device, the annular bellows (305) comprises an inner wall (306) made of an acid-base-resistant high-temperature-resistant breathable polymer film, a heat insulation layer (304) and a baffle (307) which are sleeved outside the inner wall (306), the baffle (307) is arranged at two ends of the inner wall (306) and is matched with the inner wall (306) and the inner wall (304) to surround the formed annular bellows (305) inner cavity, a plurality of baffles which are axially distributed along the annular bellows (305) are arranged in the annular bellows (305) inner cavity to separate the annular bellows (305) into a plurality of cavities which are axially and mutually isolated, the annular bellows (305) is fixed on a rotary kiln (4) to form an integral structure, the space surrounded by the inner wall of the annular bellows (305) forms a part of the inner cavity of the rotary kiln (4), the air guide device is fixed at the joint surface of the annular bellows (305) and the rotary kiln (4), the air guide device comprises a fixed cover (301), a sealing ring (302) and a rotary support (303), the fixed cover (301) is supported on a mounting plane through the rotary support (303) and is matched with the rotary kiln (4) to form a sliding channel (301) on the outer side of the two sides of the rotary kiln (301), the annular bellows (305) is provided with a plurality of channels communicated with the inner cavity of the annular bellows, one surface of the fixed cover (301) contacted with the sealing ring (302) is provided with a C-shaped groove (3011), the C-shaped groove (3011) is positioned right below a material, the sealing ring is provided with a plurality of equally-spaced ventilation openings (3021), hot air in the channels passes through the C-shaped groove and enters the channels through the ventilation openings (3021), and the channels introduce the hot air into the annular bellows (305) and directly below the material;
the waste heat utilization system comprises a main fan (5), a dust collector (6), an adjustable radiator (7) and a sedimentation heat exchanger (8) which are connected in sequence; the sedimentation heat exchanger (8) is connected with a heat exchange kiln tail box (10) through a flue gas pipeline (9), the heat exchange kiln tail box (10) is communicated with a hot air channel through a heat exchange air pipeline (12) and an oxygen enrichment fan (13) in a matching way, and a rotary seal (14) is arranged at the inlet of the hot air channel.
2. The rotary kiln molybdenum oxide roasting system for supplying oxygen to the bottom of a material by using waste heat according to claim 1, wherein: the fixed cover (301) is provided with an opening right above the material, the opening is communicated with at least one ventilation opening on the sealing ring (302), and the ventilation opening is communicated with the annular bellows (305) through a channel to blow off the top material.
3. The rotary kiln molybdenum oxide roasting system for supplying oxygen to the bottom of a material by using waste heat according to claim 1, wherein: the included angle formed by connecting the two ends of the circular arc of the central line of the C-shaped groove with the circle center of the circle where the two ends of the circular arc of the central line of the C-shaped groove are positioned is 30-180 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710263344.5A CN106931771B (en) | 2017-04-21 | 2017-04-21 | Rotary kiln molybdenum oxide roasting system for supplying oxygen to bottom of material by utilizing waste heat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710263344.5A CN106931771B (en) | 2017-04-21 | 2017-04-21 | Rotary kiln molybdenum oxide roasting system for supplying oxygen to bottom of material by utilizing waste heat |
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| Publication Number | Publication Date |
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| CN106931771A CN106931771A (en) | 2017-07-07 |
| CN106931771B true CN106931771B (en) | 2023-07-25 |
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| CN201710263344.5A Active CN106931771B (en) | 2017-04-21 | 2017-04-21 | Rotary kiln molybdenum oxide roasting system for supplying oxygen to bottom of material by utilizing waste heat |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110579110A (en) * | 2019-09-25 | 2019-12-17 | 河南科技大学 | Calcining kiln waste heat utilization kiln head box for molybdenum fine powder drying system |
| CN110579111B (en) * | 2019-09-25 | 2021-04-13 | 河南科技大学 | Molybdenum fine powder drying system utilizing waste heat of roasting kiln |
| CN112902657B (en) * | 2021-02-07 | 2023-02-28 | 中国恩菲工程技术有限公司 | Molybdenum oxide roasting system |
| CN113739566B (en) * | 2021-11-04 | 2022-02-22 | 佛山市天禄智能装备科技有限公司 | Rotary kiln with functions of reducing waste heat volatilization efficiency and recycling waste heat |
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| CN106931771A (en) | 2017-07-07 |
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