CN102583463A - Rotary kiln gas-distribution and cooling system - Google Patents
Rotary kiln gas-distribution and cooling system Download PDFInfo
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- CN102583463A CN102583463A CN2012100253805A CN201210025380A CN102583463A CN 102583463 A CN102583463 A CN 102583463A CN 2012100253805 A CN2012100253805 A CN 2012100253805A CN 201210025380 A CN201210025380 A CN 201210025380A CN 102583463 A CN102583463 A CN 102583463A
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- rotary kiln
- gas transmission
- kiln
- cooling system
- gas
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Abstract
A rotary kiln gas-distribution and cooling system comprises a rotary kiln barrel, a kiln head and a kiln tail. A fireproof layer is arranged in the rotary kiln barrel, and a cooling water jacket which is arranged between the rotary kiln barrel and the fireproof layer comprises a water inlet pipe, a water outlet pipe and a main cavity, and further the rotary kiln gas-distribution and cooling system comprises a gas transmission device. The gas transmission device comprises a gas transmission main pipe, a gas transmission branch pipe and a gas outlet spray head. The rotary kiln gas-distribution and cooling system has the advantages that the additionally-arranged gas transmission device enables hydrogen to pass through a gas distribution plate, the gas transmission main pipe and the gas transmission branch pipe and be ejected out of the gas outlet spray head so as to blow and dispel a material, and accordingly the material undergoes reduction reaction fully; besides, hydrogen is combustion-supporting, the reduction temperature is further improved, the reduction efficiency is improved, and the reaction time is shortened; the cooling water jacket is additionally arranged, the fireproof layer is cooled, the replacing times of the fireproof layer is reduced, the cost is reduced, corrosion to the rotary kiln barrel is avoided, and the service life of the rotary kiln barrel is prolonged; and burr is additionally arranged at the position of a discharging port of the rotary kiln head, the fireproof layer is covered on the burr, and the damage to the kiln head caused by the high-temperature material is effectively avoided.
Description
Technical field
The invention belongs to metallurgical technology field, be specifically related to a kind of rotary kiln distribution and cooling system.
Background technology
In the production of metallurgy industry, chemical industry inorganic salt industry, cement building material industry, all can use rotary kiln.In smelting process; Because the temperature in the cylinder of rotary kiln is up to thousands of degree even higher; And production process need keep continuous regime, so although the cylinder of rotary kiln inwall is provided with flame retardant coating, under the effects such as heat erosion that the high-temperature material in cylinder of rotary kiln continues and acid and alkali corrosion; Still can make flame retardant coating and cylinder of rotary kiln constantly encroached on and cause its damage, need correspondingly change after using certain hour.Simultaneously, cause the loss of a large amount of heat energy.Especially the discharge port place of rotary kiln end is because of heat erosion and the acid and alkali corrosion that directly suffers high-temperature material, so damaged through regular meeting and influence production.Like this, carry out the replacing of flame retardant coating, not only will delay the duration, influence production efficiency, and increase huge production cost; And then say it, if the cylinder of rotary kiln sustain damage, that just will further strengthen production cost, reduce working efficiency.And the great amount of heat energy loss causes energy dissipation.
Bauxite extracts in the process of aluminum oxide, produces a large amount of red muds; In the red soil nickel ore wet method leaching process, produced a large amount of acid sludges, caused the pollution of environment and the waste of resource.In the bauxite alkali sintering process,, make reaction not go on, thereby caused the leaching rate of alumina reduction because high temperature reduction has caused the alkali evaporation; When using kiln process to carry out iron oxide reduction, because low temperature just causes the reduction ratio of red stone not enough; Under the condition that sodium exists, the speeding up of hydrogen reducing red stone, thus realize low-temperature reduction, reduction ratio is higher than other reductive agent.Simultaneously avoid the alkali evaporation effectively, made reaction normally carry out, improved the yield of aluminum oxide, improved the reduction ratio of red stone simultaneously.Particularly to needle-like ferro-aluminum ore deposit, present Bayer process, sintering process etc. can't realize.
Summary of the invention
The technical problem that the present invention will solve is: overcome the deficiency of prior art, a kind of rotary kiln distribution and cooling system are provided, it can effectively reduce the temperature of cylinder of rotary kiln and flame retardant coating, prolongs its work-ing life, thereby has reduced production cost; Realize low-temperature reduction, improve aluminum oxide yield and iron oxide reduction rate.
The technical solution adopted for the present invention to solve the technical problems is: rotary kiln distribution and cooling system; Comprise cylinder of rotary kiln, kiln hood and kiln tail; Be provided with flame retardant coating in the said cylinder of rotary kiln, it is characterized in that: between said cylinder of rotary kiln and said flame retardant coating, a watercooling jacket is set, said watercooling jacket includes water pipe, rising pipe and main cavity; The water outlet that the feed-water end of said inhalent siphon and is gone into the supply mains is connected, and its water side is communicated with said main cavity; The feed-water end of said rising pipe is arranged in the said main cavity, and its water side is communicated with an outfall sewer;
Also comprise an air delivery device, said air delivery device comprises that a gas transmission main, a gas transmission are in charge of, the shower nozzle of giving vent to anger, and said gas transmission main is arranged at said kiln hood, is in charge of with said gas transmission to be communicated with; Said gas transmission is in charge of that to be arranged in said flame retardant coating inner, with the said shower nozzle UNICOM of giving vent to anger.
Preferably, the water-in that said inhalent siphon is gone into the supply mains connects a swivel joint, and the water outlet of said inhalent siphon is arranged at the centre of kiln tail; One end of said outfall sewer is in the heart position of kiln hood and said rising pipe UNICOM, and the other end passes to kiln hood, and connects a swivel joint; Said gas transmission main one end is in charge of with said gas transmission in the centre of said kiln hood and is communicated with, and the other end connects a gas distribution plate.
Preferably, the said shower nozzle of giving vent to anger is a Duckbill type, and its air outlet is towards kiln hood.
Preferably, said Duckbill type is given vent to anger shower nozzle by ceramic material.
Preferably, to be in charge of be more than one in said gas transmission.
Preferably, the said shower nozzle of giving vent to anger is arranged at apart from 10～50 meters of said kiln hood.
Preferably, set firmly prickle, on said prickle, cover flame retardant coating at said kiln hood top.
Compared with prior art, the invention has the beneficial effects as follows:, both flame retardant coating was lowered the temperature owing between cylinder of rotary kiln and flame retardant coating, set up watercooling jacket; Reduce it and change number of times; Reduced cost, make again cylinder of rotary kiln especially kiln hood avoid corroding, prolonged its work-ing life; The discharge port place of rotary kiln end has set up prickle and has added and cover flame retardant coating, has effectively prevented the destruction of high-temperature material to kiln hood.Watercooling jacket has absorbed a large amount of heat energy, has effectively improved the heat energy utilization rate; When material is in the cylinder of rotary kiln bottom; The air delivery device of setting up is in charge of added hydrogen through gas distribution plate, gas transmission main, gas transmission, from the shower nozzle of giving vent to anger, spray, and the hydrogen of ejection can blow afloat material, dispel; Make the material gas-solid reaction normally to carry out, reduce more abundant; And hydrogen has improved reduction efficiency, has shortened the reaction times.
Description of drawings
Fig. 1 is the structure sectional view of the embodiment of the invention;
Fig. 2 is the left view of Fig. 1.
Be labeled as among the figure:
1, cylinder of rotary kiln; 2, kiln hood; 3, kiln tail; 4, flame retardant coating; 51, inhalent siphon; 52, rising pipe; 53, main cavity; 54, go into the supply mains; 55, outfall sewer; 6, swivel joint; 71, gas transmission main; 72, gas transmission is in charge of; 73, the shower nozzle of giving vent to anger; 8, gas distribution plate; 9, prickle.
Embodiment
Below in conjunction with accompanying drawing embodiment, the present invention done further describing:
As shown in Figure 1; Rotary kiln distribution and cooling system comprise cylinder of rotary kiln 1, kiln hood 2 and kiln tail 3, are provided with flame retardant coating 4 in the said cylinder of rotary kiln 1; Between said cylinder of rotary kiln 1 and said flame retardant coating 4, watercooling jacket is set; Said watercooling jacket includes water pipe 51, rising pipe 52, main cavity 53, goes into supply mains 54, outfall sewer 55, and the feed-water end of inhalent siphon 51 is connected with the water outlet of going into supply mains 54, and its water side is communicated with said main cavity 53; The feed-water end of said rising pipe 52 is arranged in the said main cavity 53, and its water side is communicated with outfall sewer 54;
One end of outfall sewer 55 is in kiln hood 2 centres places and said rising pipe 52 UNICOMs, and the other end passes to kiln hood 2, and connects swivel joint 6; The water-in of said inhalent siphon 51 connects another swivel joint 6, and the water outlet of said inhalent siphon 51 is arranged at the centre of kiln tail 3;
Also comprise air delivery device, said air delivery device comprises that gas transmission main 71, gas transmission are in charge of 72, the shower nozzle 73 of giving vent to anger, and said gas transmission main 71 is arranged at said kiln hood 2, is in charge of 72 with said gas transmission and is communicated with; It is more than one that said gas transmission is in charge of 72, is arranged in said flame retardant coating 4 inside, with said shower nozzle 73 UNICOMs of giving vent to anger; Said gas transmission main 71 1 ends are in charge of 72 in the centre of said kiln hood 2 with said gas transmission and are communicated with, and the other end connects gas distribution plate 8.
The said shower nozzle 73 of giving vent to anger is Duckbill type, and by ceramic material, its air outlet is arranged on and 10～50 meters of said kiln hood 2 distances towards kiln hood 2; Said kiln hood 2 tops set firmly prickle 9, on said prickle 9, cover flame retardant coating 4.
The main cavity 53 of watercooling jacket just is meant that part of watercooling jacket between kiln hood 2, kiln tail 3.
The above only is preferred embodiment of the present invention, is not to be the restriction of the present invention being made other form, and any professional and technical personnel of being familiar with possibly utilize the technology contents of above-mentioned announcement to change or be modified as the equivalent embodiment of equivalent variations.But everyly do not break away from technical scheme content of the present invention, to any simple modification, equivalent variations and remodeling that above embodiment did, still belong to the protection domain of technical scheme of the present invention according to technical spirit of the present invention.
Claims (7)
1. rotary kiln distribution and cooling system; Comprise cylinder of rotary kiln, kiln hood and kiln tail; Be provided with flame retardant coating in the said cylinder of rotary kiln, it is characterized in that: between said cylinder of rotary kiln and said flame retardant coating, a watercooling jacket is set, said watercooling jacket includes water pipe, rising pipe and main cavity; The water outlet that the feed-water end of said inhalent siphon and is gone into the supply mains is connected, and its water side is communicated with said main cavity; The feed-water end of said rising pipe is arranged in the said main cavity, and its water side is communicated with an outfall sewer;
Also comprise an air delivery device, said air delivery device comprises that a gas transmission main, a gas transmission are in charge of, the shower nozzle of giving vent to anger, and said gas transmission main is arranged at said kiln hood, is in charge of with said gas transmission to be communicated with; Said gas transmission is in charge of that to be arranged in said flame retardant coating inner, with the said shower nozzle UNICOM of giving vent to anger.
2. rotary kiln distribution according to claim 1 and cooling system is characterized in that: the said supply mains's of going into water-in connects a swivel joint, and the said supply mains's of going into water outlet is arranged at the centre of kiln tail;
One end of said outfall sewer is in the centre of kiln hood and said rising pipe UNICOM, and the other end passes to kiln hood, and connects a swivel joint;
Said gas transmission main one end is in charge of with said gas transmission in the centre of said kiln hood and is communicated with, and the other end connects a gas distribution plate.
3. rotary kiln distribution according to claim 2 and cooling system is characterized in that: the said shower nozzle of giving vent to anger is a Duckbill type, and its air outlet is towards kiln hood.
4. rotary kiln distribution according to claim 3 and cooling system is characterized in that: said Duckbill type is given vent to anger shower nozzle by ceramic material.
5. rotary kiln distribution according to claim 4 and cooling system is characterized in that: it is more than one that said gas transmission is in charge of.
6. rotary kiln distribution according to claim 5 and cooling system is characterized in that: the said shower nozzle of giving vent to anger is arranged at apart from 10～50 meters of said kiln hood.
7. rotary kiln distribution according to claim 6 and cooling system is characterized in that: set firmly prickle at said kiln hood top, on said prickle, cover flame retardant coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100253805A CN102583463A (en) | 2012-01-21 | 2012-01-21 | Rotary kiln gas-distribution and cooling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100253805A CN102583463A (en) | 2012-01-21 | 2012-01-21 | Rotary kiln gas-distribution and cooling system |
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| Publication Number | Publication Date |
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| CN102583463A true CN102583463A (en) | 2012-07-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN2012100253805A Pending CN102583463A (en) | 2012-01-21 | 2012-01-21 | Rotary kiln gas-distribution and cooling system |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4462793A (en) * | 1981-08-03 | 1984-07-31 | Kawasaki Jukogyo Kabushiki Kaisha | Rotary kiln and method of using such a kiln |
| US5779468A (en) * | 1995-04-11 | 1998-07-14 | Bayer Aktiengesellschaft | Device for supplying gas to rotary kilns |
| CN2924446Y (en) * | 2006-07-19 | 2007-07-18 | 程志强 | Buried rotary kiln radical air supply device |
| CN101118113A (en) * | 2007-09-07 | 2008-02-06 | 上海中加电炉有限公司 | Heated air circulation bake oven |
| CN101153770A (en) * | 2006-09-29 | 2008-04-02 | 黄石市建材节能设备总厂 | Under-layer air distributing rotary kiln |
| CN201288201Y (en) * | 2008-10-23 | 2009-08-12 | 胡长春 | Coal based ferrum redactum rotary kiln |
| CN201621949U (en) * | 2010-04-13 | 2010-11-03 | 伍震洲 | Externally-heated coal reducing rotary kiln |
| CN202440320U (en) * | 2012-01-21 | 2012-09-19 | 胡长春 | Gas-distributing and cooling system for rotary kiln |
-
2012
- 2012-01-21 CN CN2012100253805A patent/CN102583463A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4462793A (en) * | 1981-08-03 | 1984-07-31 | Kawasaki Jukogyo Kabushiki Kaisha | Rotary kiln and method of using such a kiln |
| US5779468A (en) * | 1995-04-11 | 1998-07-14 | Bayer Aktiengesellschaft | Device for supplying gas to rotary kilns |
| CN2924446Y (en) * | 2006-07-19 | 2007-07-18 | 程志强 | Buried rotary kiln radical air supply device |
| CN101153770A (en) * | 2006-09-29 | 2008-04-02 | 黄石市建材节能设备总厂 | Under-layer air distributing rotary kiln |
| CN101118113A (en) * | 2007-09-07 | 2008-02-06 | 上海中加电炉有限公司 | Heated air circulation bake oven |
| CN201288201Y (en) * | 2008-10-23 | 2009-08-12 | 胡长春 | Coal based ferrum redactum rotary kiln |
| CN201621949U (en) * | 2010-04-13 | 2010-11-03 | 伍震洲 | Externally-heated coal reducing rotary kiln |
| CN202440320U (en) * | 2012-01-21 | 2012-09-19 | 胡长春 | Gas-distributing and cooling system for rotary kiln |
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Application publication date: 20120718 |