CN111910071A - Grate-rotary kiln pellet low NOx production system - Google Patents
Grate-rotary kiln pellet low NOx production system Download PDFInfo
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- CN111910071A CN111910071A CN202010951825.7A CN202010951825A CN111910071A CN 111910071 A CN111910071 A CN 111910071A CN 202010951825 A CN202010951825 A CN 202010951825A CN 111910071 A CN111910071 A CN 111910071A
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- 239000008188 pellet Substances 0.000 title claims abstract description 36
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 35
- 238000001816 cooling Methods 0.000 claims description 27
- 238000001035 drying Methods 0.000 claims description 12
- 230000007246 mechanism Effects 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 7
- 238000007664 blowing Methods 0.000 claims description 6
- 230000009467 reduction Effects 0.000 claims description 5
- 239000000956 alloy Substances 0.000 claims description 4
- 230000006698 induction Effects 0.000 claims description 4
- 239000011819 refractory material Substances 0.000 claims description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical group [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 11
- 239000001301 oxygen Substances 0.000 abstract description 11
- 229910052760 oxygen Inorganic materials 0.000 abstract description 11
- 230000008859 change Effects 0.000 abstract description 3
- 230000007774 longterm Effects 0.000 abstract description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 239000000446 fuel Substances 0.000 description 5
- 230000007613 environmental effect Effects 0.000 description 4
- 238000005453 pelletization Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000000571 coke Substances 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 210000003781 tooth socket Anatomy 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 229910000805 Pig iron Inorganic materials 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 238000003916 acid precipitation Methods 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 229910052595 hematite Inorganic materials 0.000 description 1
- 239000011019 hematite Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- LIKBJVNGSGBSGK-UHFFFAOYSA-N iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Fe+3].[Fe+3] LIKBJVNGSGBSGK-UHFFFAOYSA-N 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Images
Classifications
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- 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
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/16—Sintering; Agglomerating
- C22B1/20—Sintering; Agglomerating in sintering machines with movable grates
-
- 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
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/16—Sintering; Agglomerating
- C22B1/216—Sintering; Agglomerating in rotary furnaces
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Muffle Furnaces And Rotary Kilns (AREA)
Abstract
The invention provides a grate-rotary kiln pellet low NOx production system, comprising: the rotary kiln comprises a central burner, and the central burner comprises an air inlet system; the air inlet system comprises a plurality of air inlet pipes arranged on the outer circumference of the central burner in an annular array and an air inlet main pipe communicated with the air inlet pipes; the air inlet pipe comprises an inlet and an outlet, the inlet is communicated with the air inlet main pipe, a flow valve is arranged at the inlet, and the outlet of the air inlet pipe is positioned in the rotary kiln. The invention can change the position of the oxygen-rich area in the rotary kiln from time to time by setting the position of the air inlet pipe and the flow rate in the rotary kiln, thereby solving the problem of long-term fixed overlapping of the oxygen-rich area and the high-temperature area in the rotary kiln and reducing the emission of NOx.
Description
Technical Field
The invention relates to the fields of pellet production and environmental protection, in particular to a grate-rotary kiln pellet low NOx production system.
Background
The pellet ore is the main iron-containing furnace burden generated by blast furnace ironmaking in China, and the yield of the pellet ore in China is 12800 ten thousand tons in 2015. Compared with sintered ore, because the energy consumption in the pellet production process is low, the environment is relatively friendly, and the product has the advantages of good strength, high grade and good metallurgical performance, and can play the roles of increasing yield and saving coke, improving the economic index of the iron-making technology, reducing the pig iron cost and improving the economic benefit when being applied to blast furnace smelting, the pellet ore is vigorously developed in recent years in China.
The production of the pellets in China is mainly based on a grate-rotary kiln process, and the yield of the pellets accounts for more than 60 percent of the total yield of the pellets. In recent years, along with the increasing complexity of iron ore raw materials and fuels, the proportion of hematite is improved (resulting in the rise of roasting temperature), the scale utilization of low-quality fuels, the application of nitrogen-containing coke oven gas of a gas-based rotary kiln, and the like, so that NO is generated in the production process of pellets of a plurality of enterprisesxThe emission concentration is in an ascending trend; in addition, the increasingly severe environmental protection requirement of China is NOxEmissions were included in the emissions assessment system. NOxIs the main reason for forming photochemical smog, acid rain and dust haze weather, aggravating ozone layer damage and promoting greenhouse effect, and has great harm to the ecological environment. From 2015 onwards, pellet production of NOx(with NO)2Meter) emission limit 300mg/m3Therefore, the part of enterprises can meet the national emission standard by adding the denitration facility. The national environmental protection agency of 6 months in 2017 issues a revised notice of 'emission standards of atmospheric pollutants for the iron and steel sintering and pelletizing industry', and NO is addedx(with NO)2Meter) emission limits from 300mg/Nm3Down-regulated to 100mg/Nm3The reference oxygen content of sintering and pellet roasting flue gas is 16%.
Although the pelletizing enterprises do a great deal of work in the environmental protection aspect, the dust removal and the desulfurization are effectively controlled, and the emission requirements can be met, the NO is currentlyxBecause the removal cost is high and the process is complex, under the environment with a low steel form, the method brings new challenges to the pelletizing industry, and part of enterprises are caused by NOxExceeding standard has to reduce production greatly, even facing shutdown. From the perspective of most pellet production situations at present, NOxThe discharge concentration is generally 200-400 mg/m3If one can start from the source and process, reduce NOxThe production can meet the emission requirement, the tail end denitration purification equipment can be saved, the production significance of the grate-rotary kiln pellet is great, and the life of the pellet production can be further improvedAnd competitiveness.
NOxThe generation of the heat energy is mainly from two forms of fuel type and thermal type, although the temperature of the rotary kiln can be reduced by reducing the injection amount of coal gas or coal powder and adopting lower NOxThe measures of raw materials and fuels and the like are adopted to reduce NO in the production process of the grate-rotary kiln pelletsxThe production amount of (2) but the requirements for raw fuel procurement, process system optimization and equipment system selection are too strict, and if the production process is unstable, NO is causedxThe excess of (A) is exceeded, in the prior art, NO is generated because of long-term fixed overlapping of an oxygen-rich area and a high-temperature area in a rotary kilnxHigh concentration, NO requirement in the production process of grate-rotary kiln pelletsxThe emission requirement is responded to the national call of energy conservation and emission reduction, and the NO is reducedxStarting from a burner technology, a grate-rotary kiln pellet low NOx production system is provided for realizing low NO at presentxAnd (4) pelletizing production.
Disclosure of Invention
The invention aims to provide a grate-rotary kiln pellet low NOx production system, which can change the position of an oxygen-rich area in a rotary kiln from time to time by arranging the position of an air inlet pipe and the flow rate in the rotary kiln from time to time, thereby solving the problem of long-term fixed overlapping of the oxygen-rich area and a high-temperature area in the rotary kiln and reducing the discharge of NOx.
The invention provides a grate-rotary kiln pellet low NOx production system, comprising:
a chain grate machine, a rotary kiln and a circular cooler; wherein: according to the process trend, the chain grate is provided with an air blowing drying section UDD, an air draft drying section DDD, a preheating section TPH and a preheating section PH, the ring cooling machine is sequentially provided with a ring cooling section, a ring cooling section and a ring cooling section, and the tail end of the rotary kiln is connected with the preheating section PH of the chain grate and the ring cooling section of the ring cooling machine at the other end;
wherein: an air outlet of the annular cooling section is connected to an air inlet of the rotary kiln through a first pipeline, an air outlet of the rotary kiln is connected to an air inlet of the preheating section PH through a second pipeline, and an air outlet of the preheating section PH is connected to an air inlet of the exhausting and drying section DDD through a third pipeline;
the air outlet of the annular cooling second section is connected to the air inlet of the preheating first section of TPH through a fourth pipeline; an air outlet of the annular cooling section is connected to an air inlet of the air blowing drying section UDD through a fifth pipeline;
preferably, the rotary kiln comprises a central burner, and the central burner comprises an air inlet system;
the air inlet system comprises a plurality of air inlet pipes arranged on the outer circumference of the central burner in an annular array and an air inlet main pipe communicated with the air inlet pipes; the air inlet pipe comprises an inlet and an outlet, the inlet is communicated with the air inlet main pipe, a flow valve is arranged at the inlet, and the outlet of the air inlet pipe is positioned in the rotary kiln.
Preferably, the flow valve comprises a control element, an actuating element and an induction element, wherein the actuating element and the induction element are arranged on one side of the flow valve; the control part comprises a rotating ring and a proximity switch which is arranged on the inner side of the rotating ring and is matched with the sensing part, and the actuating part receives a signal sent by the proximity switch at the sensing part, so that the opening and closing operations of the flow valve are realized.
Preferably, the device further comprises a driving mechanism for driving the rotating ring to rotate and a controller, wherein the controller is used for controlling the rotating speed of the driving mechanism.
Preferably, the driving mechanism comprises a support, a worm and gear speed reducing motor arranged on the support, a gear arranged on an output shaft of the worm and gear speed reducing motor, and a tooth socket arranged on the outer circumference of the rotating ring, the rotating ring is rotatably arranged on the support, and the tooth socket is matched with the gear.
Preferably, the rotary kiln further comprises a temperature sensor which is arranged on the inner wall of the rotary kiln and corresponds to the air inlet pipe.
Preferably, the outer surface of the central burner is poured with a refractory material.
Preferably, the number of the air inlet pipes is 6, and the air inlet pipes are uniformly distributed on the outer surface of the central burner.
Preferably, the outlet of the air inlet extends towards the center of the central burner and is arranged in a gathering manner.
Preferably, the central burner is made of alloy materials.
Drawings
FIG. 1 is a schematic diagram of a grate-rotary kiln pellet low NOx production system of the present invention;
FIG. 2 is a schematic view of the rotary kiln of the embodiment of FIG. 1;
FIG. 3 is a schematic view of a central burner;
FIG. 4 is a schematic structural view of another embodiment of the central burner of FIG. 3;
the device comprises a rotary kiln 10, a central burner 20, an air inlet system 30, an air inlet pipe 31, a rotating ring 32, a proximity switch 33, a flow valve 34, a sensing element 35, a support 36 and a driving mechanism 37.
Detailed Description
The invention provides a grate-rotary kiln 10 pellet low NOx production process, and with reference to figures 1 to 4, the grate-rotary kiln 10 pellet low NOx production process comprises the following steps: a chain grate machine, a rotary kiln 10 and a circular cooler; wherein: according to the process trend, the chain grate is provided with an air blowing drying section UDD, an air draft drying section DDD, a preheating section TPH and a preheating section PH, the ring cooling machine is sequentially provided with a ring cooling section, a ring cooling section and a ring cooling section, and the tail end of the rotary kiln 10 is connected with the preheating section PH of the chain grate and the ring cooling section of the ring cooling machine at the other end;
wherein: an air outlet of the annular cooling section is connected to an air inlet of the rotary kiln 10 through a first pipeline, an air outlet of the rotary kiln 10 is connected to an air inlet of the preheating section PH through a second pipeline, and an air outlet of the preheating section PH is connected to an air inlet of the exhausting and drying section DDD through a third pipeline;
the air outlet of the annular cooling second section is connected to the air inlet of the preheating first section of TPH through a fourth pipeline; an air outlet of the annular cooling section is connected to an air inlet of the air blowing drying section UDD through a fifth pipeline;
further, the rotary kiln 10 comprises a central burner 20, and the central burner 20 comprises an air inlet system 30;
the air inlet system 30 comprises a plurality of air inlet pipes 31 arranged on the outer circumference of the central burner 20 in an annular array and an air inlet main pipe communicated with the air inlet pipes 31; the air inlet pipe 31 comprises an inlet and an outlet, the inlet is communicated with the air inlet main pipe, a flow valve 34 is arranged at the inlet, and the outlet of the air inlet pipe 31 is positioned in the rotary kiln 10. The flow valve 34 controls the air inlet position and the air flow of the air inlet pipe 31.
Further, the flow valve 34 includes a control member, and an actuating member and an induction member 35 provided on one side of the flow valve 34; the control member comprises a rotating ring 32 and a proximity switch 33 which is arranged on the inner side of the rotating ring 32 and is matched with the sensing member 35, and the actuating member receives a signal sent by the proximity switch 33 at the sensing member 35, so that the on-off operation of the flow valve 34 is realized. When the rotary kiln inlet flow valve is in work, the control piece controls the flow valves 34 in a rotating mode, the flow valves 34 can be opened sequentially according to a clockwise sequence, a counterclockwise sequence or other set sequences, inlet air is supplied into the rotary kiln 10, and when one flow valve 34 is opened, the other flow valves 34 are in a closed state and circulate sequentially.
Further, the device also comprises a driving mechanism 37 for driving the rotating ring 32 to rotate, and a controller for controlling the rotating speed of the driving mechanism 37. The controller controls the rotating speed of the driving mechanism 37, so that the opening time of the flow valve 34 is controlled, the air intake at a designated position in the rotary kiln 10 is further controlled, and the overlapping time of the oxygen-enriched area and the high-temperature area is reduced.
Further, the driving mechanism 37 includes a bracket 36, a worm gear reduction motor disposed on the bracket 36, a gear disposed on an output shaft of the worm gear reduction motor, and a tooth slot disposed on an outer circumference of the rotating ring 32, wherein the rotating ring 32 is rotatably disposed on the bracket 36, and the tooth slot is adapted to the gear. Through the drive of gear tooth's socket to and worm gear motor drive, it is steady to operate, the control piece control flow valve 34 is more accurate.
Further, the rotary kiln comprises a temperature sensor which is arranged on the inner wall of the rotary kiln 10 and corresponds to the air inlet pipe 31. The temperature sensor is used for sensing the temperature in the rotary kiln 10, transmitting a signal to the control element and further driving the flow valve 34 to be opened and closed.
Furthermore, a refractory material is poured on the outer surface of the central burner 20.
Furthermore, the number of the air inlet pipes 31 is 6, and the air inlet pipes are uniformly distributed on the outer surface of the central burner 20, and the air inlet positions are uniformly distributed, so that the air inlet system 30 controls the position change of the oxygen-enriched area.
Further, the outlet of the air inlet extends towards the center of the central burner 20 and is arranged in a gathering manner. The outlets of the air inlets are gathered, and the flow valves 34 are controlled to be opened in sequence, so that the outlets of the central burner 20 form swirling flow, the position of the oxygen-enriched area is changed in real time, and low NOx emission is realized
Further, the central burner 20 is made of an alloy material, preferably, a nickel alloy material, and is resistant to high temperature.
The low NOx production process of the grate-rotary kiln 10 pellets has the advantages that:
the invention comprises an air inlet pipe 31, a flow valve 34 arranged at the inlet of the air inlet pipe 31 controls the entering position and the flow rate of the air inlet pipe 31 entering the rotary kiln 10, and the entering position and the flow rate of the air inlet pipe 31 are changed in the rotary kiln 10 from time to time, so that the position of an oxygen-enriched area in the rotary kiln 10 is changed from time to time, thereby solving the problem that the oxygen-enriched area and a high-temperature area in the rotary kiln 10 are fixedly overlapped for a long time, and reducing the emission of NOx.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, however, as long as there is no contradiction between the combinations of the technical features, the scope of the present description should be considered as being described in the present specification. The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit and scope of the invention.
Claims (9)
1. A grate-rotary kiln pellet low NOx production system is characterized by comprising:
a chain grate machine, a rotary kiln and a circular cooler; wherein: according to the process trend, the chain grate is provided with an air blowing drying section UDD, an air draft drying section DDD, a preheating section TPH and a preheating section PH, the ring cooling machine is sequentially provided with a ring cooling section, a ring cooling section and a ring cooling section, and the tail end of the rotary kiln is connected with the preheating section PH of the chain grate and the ring cooling section of the ring cooling machine at the other end;
wherein: an air outlet of the annular cooling section is connected to an air inlet of the rotary kiln through a first pipeline, an air outlet of the rotary kiln is connected to an air inlet of the preheating section PH through a second pipeline, and an air outlet of the preheating section PH is connected to an air inlet of the exhausting and drying section DDD through a third pipeline;
the air outlet of the annular cooling second section is connected to the air inlet of the preheating first section of TPH through a fourth pipeline; an air outlet of the annular cooling section is connected to an air inlet of the air blowing drying section UDD through a fifth pipeline;
the method is characterized in that: the rotary kiln comprises a central burner, and the central burner comprises an air inlet system;
the air inlet system comprises a plurality of air inlet pipes arranged on the outer circumference of the central burner in an annular array and an air inlet main pipe communicated with the air inlet pipes; the air inlet pipe comprises an inlet and an outlet, the inlet is communicated with the air inlet main pipe, a flow valve is arranged at the inlet, and the outlet of the air inlet pipe is positioned in the rotary kiln.
2. The grate-rotary kiln pellet low NOx production system of claim 1, wherein the flow valve comprises a control member and an actuating member and an induction member disposed at one side of the flow valve; the control part comprises a rotating ring and a proximity switch which is arranged on the inner side of the rotating ring and is matched with the sensing part, and the actuating part receives a signal sent by the proximity switch at the sensing part, so that the opening and closing operations of the flow valve are realized.
3. The grate-kiln pellet low NOx production system of claim 2 further comprising a driving mechanism for driving the rotating ring to rotate and a controller for controlling the rotation speed of the driving mechanism.
4. The grate-kiln pellet low NOx production system of claim 3, wherein the driving mechanism comprises a support, a worm gear speed reduction motor disposed on the support, a gear disposed on an output shaft of the worm gear speed reduction motor, and a tooth space disposed on an outer circumference of the rotating ring, the rotating ring is rotatably disposed on the support, and the tooth space is adapted to the gear.
5. The grate-kiln pellet low NOx production system of claim 1, further comprising a temperature sensor disposed on the inner wall of the rotary kiln corresponding to the air inlet duct.
6. The grate-kiln pellet low NOx production system of claim 1 wherein the outer surface of the central burner is cast with refractory material.
7. The grate-kiln pellet low NOx production system of claim 1, wherein 6 air inlet pipes are uniformly arranged on the outer surface of the central burner.
8. The grate-kiln pellet low NOx production system of claim 7 wherein the outlet of the inlet is extended toward the center of the central burner.
9. The grate-kiln pellet low NOx production system of claim 1 wherein the central burner is made of an alloy material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010951825.7A CN111910071A (en) | 2020-09-11 | 2020-09-11 | Grate-rotary kiln pellet low NOx production system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010951825.7A CN111910071A (en) | 2020-09-11 | 2020-09-11 | Grate-rotary kiln pellet low NOx production system |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3861859A (en) * | 1972-07-31 | 1975-01-21 | Sherwood William L | Cooling of rotary furnace shell burner pipes and method |
| WO2010007849A1 (en) * | 2008-07-16 | 2010-01-21 | 株式会社神戸製鋼所 | Method for producing iron ore pellets |
| CN104613752A (en) * | 2015-01-05 | 2015-05-13 | 中钢集团鞍山热能研究院有限公司 | Secondary air oxygen-enrichment pulse combustion gas spraying device and method of rotary kiln |
| CN106052378A (en) * | 2016-06-16 | 2016-10-26 | 中冶长天国际工程有限责任公司 | Low-NOx clean combustion type rotary kiln and combustion control method thereof |
| CN107420898A (en) * | 2017-07-28 | 2017-12-01 | 佛山市科皓燃烧设备制造有限公司 | A kind of New Regenerative flat flame burner |
| WO2019007001A1 (en) * | 2017-07-07 | 2019-01-10 | 中冶南方工程技术有限公司 | Regenerative combustion type coal-based shaft furnace and direct reduction production method |
| CN110173981A (en) * | 2019-04-12 | 2019-08-27 | 新兴铸管股份有限公司 | A kind of low nitrogen combustion apparatus and method of pelletizing rotary kiln |
| CN211367681U (en) * | 2019-07-22 | 2020-08-28 | 中冶长天国际工程有限责任公司 | Novel rotary kiln system and pellet upgrading low-oxygen low-NOx production system |
| CN212688150U (en) * | 2020-09-11 | 2021-03-12 | 黄湛明 | Grate-rotary kiln pellet low NOx production system |
-
2020
- 2020-09-11 CN CN202010951825.7A patent/CN111910071A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3861859A (en) * | 1972-07-31 | 1975-01-21 | Sherwood William L | Cooling of rotary furnace shell burner pipes and method |
| WO2010007849A1 (en) * | 2008-07-16 | 2010-01-21 | 株式会社神戸製鋼所 | Method for producing iron ore pellets |
| CN104613752A (en) * | 2015-01-05 | 2015-05-13 | 中钢集团鞍山热能研究院有限公司 | Secondary air oxygen-enrichment pulse combustion gas spraying device and method of rotary kiln |
| CN106052378A (en) * | 2016-06-16 | 2016-10-26 | 中冶长天国际工程有限责任公司 | Low-NOx clean combustion type rotary kiln and combustion control method thereof |
| WO2019007001A1 (en) * | 2017-07-07 | 2019-01-10 | 中冶南方工程技术有限公司 | Regenerative combustion type coal-based shaft furnace and direct reduction production method |
| CN107420898A (en) * | 2017-07-28 | 2017-12-01 | 佛山市科皓燃烧设备制造有限公司 | A kind of New Regenerative flat flame burner |
| CN110173981A (en) * | 2019-04-12 | 2019-08-27 | 新兴铸管股份有限公司 | A kind of low nitrogen combustion apparatus and method of pelletizing rotary kiln |
| CN211367681U (en) * | 2019-07-22 | 2020-08-28 | 中冶长天国际工程有限责任公司 | Novel rotary kiln system and pellet upgrading low-oxygen low-NOx production system |
| CN212688150U (en) * | 2020-09-11 | 2021-03-12 | 黄湛明 | Grate-rotary kiln pellet low NOx production system |
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