CN102583944A - Blast furnace sludge drying system suitable for rotary hearth furnace production and drying method thereof - Google Patents
Blast furnace sludge drying system suitable for rotary hearth furnace production and drying method thereof Download PDFInfo
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- CN102583944A CN102583944A CN2012100581354A CN201210058135A CN102583944A CN 102583944 A CN102583944 A CN 102583944A CN 2012100581354 A CN2012100581354 A CN 2012100581354A CN 201210058135 A CN201210058135 A CN 201210058135A CN 102583944 A CN102583944 A CN 102583944A
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Abstract
The invention discloses a blast furnace sludge drying system suitable for the rotary hearth furnace production and a drying method thereof. The system comprises a smoke furnace, a hybrid air cylinder, a cylinder dryer, a deduster and a fan. The system has the advantages of simple structure and low cost. According to the method, an elevated shoveling plate arranged on the front segment of the cylinder dryer brings up sludge from the accumulation position to increase the heat exchange area; the sludge continuously slide to a grid type shoveling plate arranged on the rear end of the cylinder dryer to reduce the reactionary gap; and above design can effectively improve the drying effect.
Description
Technical field
The present invention relates to the technical field of useless treatment industry admittedly, particularly a kind of blast furnace mud drying system and furnace drying method that is applicable to that rotary hearth furnace is produced.
Background technology
The rotary hearth furnace technology is ripe gradually and in the successful Application of engineering, for handling the useless admittedly processing of Iron And Steel Plant method is provided, and has realized iron and steel enterprise's resource circulation utilization, has reduced pollutant emission.
Blast furnace wet dedusting ash is that blast furnace mud contains multiple elements such as zinc, iron, carbon, has great recovery value.But the blast furnace sludge moisture content is high, and viscosity is big, and rotary hearth furnace utilizes difficulty big.
The rotary hearth furnace technology adopts following two kinds of methods to the processing of blast furnace mud at present:
1, can wait dry ash to stir in blast furnace mud and sack dust, electric furnace, get into the rotary hearth furnace feed circuit after the stirring again, carry out next step batching, batch mixing, pressure ball operation;
Present method is difficult to real mixing in actual production process, and dried wet feed is uneven, when next step operation is handled, batch bin can occur; Ball press is sticking stifled, and the blanking difficulty is difficult to continuous production, and because batch mixing is irregular; Caused the rotary hearth furnace reduction poor effect, resource can not limitedly be utilized
2, blast furnace mud is dried the back and get into the processing of rotary hearth furnace operation.
Present method is drying plants such as employing rotary drum dryer, utilizes high-temperature flue gas as thermal source, and blast furnace mud is dried to below 10% by 40% water.Mud after the oven dry gets into feed proportioning system again, is easy to mixing.
Adopt drying means to handle blast furnace mud and have more advantage undoubtedly, rotary hearth furnace is handled, produces more smooth and easy.
But also there is bottleneck in the drying technology of blast furnace mud: the high viscosity of the mud of blast furnace and water ratio can cause bonding in dryer, drying course caking poor thermal efficiency, dryer discharging-material size not to guarantee; In addition, the dryer flue-gas temperature is difficult to control, may cause to be lower than dew-point temperature and to make cloth bag be stained with knot.
So, need a kind of new technical scheme to address the above problem.
Summary of the invention
To above-mentioned existing in prior technology problem and shortage, the purpose of this invention is to provide a kind of simple in structure and drying effect is preferable is applicable to blast furnace mud drying system and the furnace drying method that rotary hearth furnace is produced.
For realizing above-mentioned purpose, the present invention is applicable to that the blast furnace mud drying system of rotary hearth furnace production can adopt following technical scheme:
A kind of blast furnace mud drying system that is applicable to that rotary hearth furnace is produced comprises the flue gas stove, connects the mixed air duct of flue gas stove, connects rotary drum dryer, fly-ash separator that connects rotary drum dryer that mixes air duct and the blower fan that connects fly-ash separator; The ingress of rotary drum dryer is connected with the blanking chute, and the rotary drum dryer set inside is broken up device and flight, rotary drum dryer be obliquely installed and and the inclination angle of horizontal plane between 3-5 ℃.
The present invention is applicable to that the furnace drying method of the blast furnace mud drying system of rotary hearth furnace production can adopt following technical scheme:
Said flight comprises lift flight that is positioned at the rotary drum dryer leading portion and the grid-like flight that is positioned at the rotary drum dryer back segment; The flue gas stove produces high-temperature flue gas in mixed air duct and air mixed, gets into rotary drum dryer again as the oven dry thermal source; Blast furnace mud is bonded at and breaks up on the device after getting into rotary drum dryer, along with the rotation of rotary drum dryer, breaks up device and mud is broken up has been avoided caking; Elevate a turnable ladder formula flight in the setting of rotary drum dryer leading portion takes up mud come to increase heat interchanging area from accumulation; Mud continues to slide on the grid-like flight that is provided with in the rotary drum dryer rear end to have reduced the reaction drop then.
The present invention is compared with prior art: system architecture of the present invention is simple, and cost is lower; And breaing up device among the present invention breaks up mud and has avoided caking; Elevate a turnable ladder formula flight in the setting of rotary drum dryer leading portion takes up mud come to increase heat interchanging area from accumulation; Mud continues to slide on the grid-like flight that is provided with in the rotary drum dryer rear end to have reduced the reaction drop then; More than design all can effectively improve drying effect; The flue gas stove produces high-temperature flue gas at mixed air duct and air mixed, may command bake out temperature.
Description of drawings
Fig. 1 is the structural representation of blast furnace mud drying system of the present invention;
Fig. 2 a is the structural representation of lift flight in the blast furnace mud drying system of the present invention;
Fig. 2 b is the structural representation of grid-like flight in the blast furnace mud drying system of the present invention;
Fig. 2 c is for breaing up the structural representation of device in the blast furnace mud drying system of the present invention.
Embodiment
Below in conjunction with accompanying drawing and embodiment; Further illustrate the present invention; Should understand following embodiment only be used to the present invention is described and be not used in the restriction scope of the present invention; After having read the present invention, those skilled in the art all fall within the application's accompanying claims institute restricted portion to the modification of the various equivalent form of values of the present invention.
See also shown in Fig. 1, Fig. 2 a, Fig. 2 b and Fig. 2 c; The present invention discloses a kind of blast furnace mud drying system that is applicable to that rotary hearth furnace is produced; The mixed air duct 2 that comprises flue gas stove 1, connection flue gas stove 1 connects rotary drum dryer 3, fly-ash separator 4 that connects rotary drum dryer 3 that mixes air duct 2 and the blower fan 5 that connects fly-ash separator 4; The ingress of rotary drum dryer 3 is connected with blanking chute 6, and rotary drum dryer 3 set inside are broken up device 11 and flight, rotary drum dryer 3 be obliquely installed and and the inclination angle of horizontal plane between 3-5 ℃.Wherein flight comprises the lift flight 9 that is positioned at rotary drum dryer 3 leading portions and is positioned at the grid-like flight 10 of rotary drum dryer 3 back segments.In this embodiment, to break up device 11 for chain and spring are formed by connecting, and arrange one group along the every 500mm of round shape dryer 3 length directions, every group of 16 circumferential directions are uniformly distributed with.Certainly, this is broken up device 11 and also can arrange that quantity also can change by chain and other equipment combination replacements.Be connected with chimney 7 between rotary drum dryer 3 and the fly-ash separator 4, be provided with regulated valve 8 in the chimney 7.
Please combine again shown in Fig. 1, Fig. 2 a, Fig. 2 b and Fig. 2 c; When using the above-mentioned blast furnace mud drying system that is applicable to rotary hearth furnace production to dry; Flue gas stove 1 produces high-temperature flue gas about mixed air duct 2 and air mixed to 500 ℃, gets into rotary drum dryer 3 again as drying thermals source.Flight comprises the lift flight 9 that is positioned at rotary drum dryer 3 leading portions and is positioned at the grid-like flight 10 of rotary drum dryer 3 back segments; Blast furnace mud is bonded at and breaks up on the device 11 after getting into rotary drum dryer 3, along with the rotation of rotary drum dryer 3, breaks up device 11 and mud is broken up has been avoided caking; Elevate a turnable ladder formula flight 9 in rotary drum dryer 3 leading portion settings takes up mud come to increase heat interchanging area from accumulation; Mud continues to slide on the grid-like flight 10 that is provided with in rotary drum dryer 3 rear ends to have reduced the reaction drop then, and the dust that is pulled away reduces, and in addition, grid-like flight 10 stirs with rotary drum dryer 3, and mud stirs, and more helps drying in the oven dry later stage.The oven drying at low temperature that is arranged so that mixes air duct 2 becomes possibility, has reduced the loss of carbon in the blast furnace mud drying course.In this embodiment, rotary drum dryer 3 adopts speed control by frequency variation in rotary drum dryer 3 exits temperature measuring equipment to be set, when detected temperatures is lower than 120 ℃; Reduce rotary drum dryer 3 rotating speeds; Reduce feeding coal, rise to more than 120 ℃, guarantee that fly-ash separator 4 temperature are higher than dew point until flue gas.In this embodiment, rotary drum dryer 3 is provided with the flue gas by-pass collar, is lower than 100 ℃ when detecting flue-gas temperature, opens regulated valve 8, and flue gas is directly discharged through chimney 7, without fly-ash separator 4, avoids the sticking stifled fly-ash separator 4 of vapor condenses.
Claims (7)
1. blast furnace mud drying system that is applicable to that rotary hearth furnace is produced; It is characterized in that: comprise the mixed air duct (2) of flue gas stove (1), connection flue gas stove (1), connect rotary drum dryer (3), fly-ash separator (4) that connects rotary drum dryer (3) that mixes air duct (2) and the blower fan (5) that connects fly-ash separator (4); The ingress of rotary drum dryer (3) is connected with blanking chute (6), and rotary drum dryer (3) set inside is broken up device (11) and flight, rotary drum dryer (3) be obliquely installed and and the inclination angle of horizontal plane between 3-5 ℃.
2. the blast furnace mud drying system that is applicable to that rotary hearth furnace is produced according to claim 1, it is characterized in that: said flight comprises the lift flight (9) that is positioned at rotary drum dryer (3) leading portion and is positioned at the grid-like flight (10) of rotary drum dryer (3) back segment.
3. the blast furnace mud drying system that is applicable to that rotary hearth furnace is produced according to claim 1; It is characterized in that: the said device (11) of breaing up is formed by connecting for chain and spring; And every 500mm arranges one group along round shape dryer (3) length direction, and every group of 16 circumferential directions are uniformly distributed with.
4. the blast furnace mud drying system that is applicable to that rotary hearth furnace is produced according to claim 1 is characterized in that: be connected with chimney (7) between said rotary drum dryer (3) and the fly-ash separator (4), be provided with regulated valve (8) in the said chimney (7).
5. the furnace drying method that is applicable to the blast furnace mud drying system that rotary hearth furnace is produced according to claim 1, it is characterized in that: said flight comprises the lift flight (9) that is positioned at rotary drum dryer (3) leading portion and is positioned at the grid-like flight (10) of rotary drum dryer (3) back segment; Flue gas stove (1) produces high-temperature flue gas in mixed air duct (2) and air mixed, gets into rotary drum dryer (3) again as the oven dry thermal source; Blast furnace mud is bonded at and breaks up on the device (11) after getting into rotary drum dryer (3), along with the rotation of rotary drum dryer (3), breaks up device (11) and mud is broken up has been avoided caking; The elevate a turnable ladder formula flight (9) that is provided with at rotary drum dryer (3) leading portion takes up mud come to increase heat interchanging area from accumulation; Mud continues to slide on the grid-like flight (10) that is provided with in rotary drum dryer (3) rear end to have reduced the reaction drop then.
6. the furnace drying method that is applicable to the blast furnace mud drying system that rotary hearth furnace is produced according to claim 5; It is characterized in that: temperature measuring equipment is set in rotary drum dryer (3) exit; When detected temperatures is lower than 120 ℃; Reduce rotary drum dryer (3) rotating speed, reduce feeding coal, rise to more than 120 ℃ until flue gas.
7. according to claim 5 or the 6 described furnace drying methods that are applicable to the blast furnace mud drying system that rotary hearth furnace is produced, it is characterized in that: be connected with chimney (7) between said rotary drum dryer (3) and the fly-ash separator (4), be provided with regulated valve (8) in the said chimney (7); Said rotary drum dryer (3) is provided with the flue gas by-pass collar, is lower than 100 ℃ when detecting flue-gas temperature, opens regulated valve (8), and flue gas is directly discharged through chimney (7).
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| CN2012100581354A CN102583944A (en) | 2012-03-09 | 2012-03-09 | Blast furnace sludge drying system suitable for rotary hearth furnace production and drying method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104592510A (en) * | 2015-01-09 | 2015-05-06 | 上海大学 | side group-modified poly-amino acid material, elastic hydrogel and preparation method of elastic hydrogel |
| CN104781066A (en) * | 2012-09-20 | 2015-07-15 | 鲍尔管泵有限责任公司 | Method for separating recommended crops from manure |
| CN106904809A (en) * | 2017-03-11 | 2017-06-30 | 佛山丰汇机械有限公司 | A kind of revolution cylinder drier with spouted bed high pressure draught sludge dispersing device |
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2012
- 2012-03-09 CN CN2012100581354A patent/CN102583944A/en active Pending
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| WO1991005213A1 (en) * | 1989-10-06 | 1991-04-18 | Beloit Corporation | High turndown rotary dryer flights |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104781066A (en) * | 2012-09-20 | 2015-07-15 | 鲍尔管泵有限责任公司 | Method for separating recommended crops from manure |
| CN104592510A (en) * | 2015-01-09 | 2015-05-06 | 上海大学 | side group-modified poly-amino acid material, elastic hydrogel and preparation method of elastic hydrogel |
| CN106904809A (en) * | 2017-03-11 | 2017-06-30 | 佛山丰汇机械有限公司 | A kind of revolution cylinder drier with spouted bed high pressure draught sludge dispersing device |
| CN106904809B (en) * | 2017-03-11 | 2020-11-10 | 佛山丰汇环保工程有限公司 | Rotary drum dryer with high-pressure airflow sludge scattering device of jet bed |
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Application publication date: 20120718 |