CN103896501A - Kiln tail ventilation system and kiln tail ventilation process of lime production line - Google Patents
Kiln tail ventilation system and kiln tail ventilation process of lime production line Download PDFInfo
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- CN103896501A CN103896501A CN201310738409.9A CN201310738409A CN103896501A CN 103896501 A CN103896501 A CN 103896501A CN 201310738409 A CN201310738409 A CN 201310738409A CN 103896501 A CN103896501 A CN 103896501A
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- kiln tail
- preheater
- dust
- tail ventilation
- disconnector
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- 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
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/40—Production or processing of lime, e.g. limestone regeneration of lime in pulp and sugar mills
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Abstract
The invention relates to a kiln tail ventilation system and a kiln tail ventilation process of a lime production line. The kiln tail ventilation system comprises a rotary kiln, a vertical preheater, a stock bin at the upper part of the preheater, an output air duct, an air-cooled inertia gravity separator, an input dust remover air duct, a bag-type dust remover, an air blower and a chimney. The kiln tail ventilation process comprises the following steps: feeding waste heat generated by the rotary kiln into the vertical preheater for preheating materials; outputting waste gas containing multiple substances and dust from the output air duct after the materials are preheated; feeding the waste gas into the air-cooled inertia gravity separator for separating large dust granules and cooling the large dust granules through cold air; feeding the gas into the bag-type dust remover and discharging the gas reaching the discharge standard from the chimney; and feeding the dust granules into subsequent equipment (dust-removing output pump) for recycling the dust. The kiln tail ventilation process has the advantages that the waste gas of the preheater is not doped with the cold air; and the temperature of flue gas is decreased and the large dust granules in the flue gas can be collected. The kiln tail ventilation system has the advantages that the cold air is not doped during the running of the system; the system resistance is not increased; the energy source is saved; and the production cost is lowered.
Description
Technical field
The present invention relates to the dust removal by ventilation field of smelting industry lime production system, particularly a kind of lime production line kiln tail ventilation system and kiln tail ventilation technique.
Background technology
At present at all widespread use band preheater rotary system production quickened lime products of all conglomeraties such as metallurgy, non-ferrous metal, mine sintering, calcium carbide, papermaking, chemical industry.The production of rotary system is mainly that Wingdale is carried out pre-thermolysis by the fume afterheat that utilizes rotary kiln firing system to produce by preheater, thereby reaches energy-conservation, raising production capacity effect.In the middle of producing, Wingdale produces CO after the pre-thermolysis of preheater
2gas, firing system fuel produces a large amount of flue gases in combustion processes, and Wingdale produces a certain amount of dust and flue gas waste gas in warm He in rotary kiln running, and these waste gas containing dust must have kiln tail ventilating and purifying air system.
With preheater rotary kiln produce quickened lime at home and external enterprise be applied more widely, its technical process is substantially similar, the ventilating and purifying air system technical process of kiln tail and equipment select to exist some differences, some employing list blower fan primary dust removing systems, some employing list blower fan secondary dust collecting systems, the two blower fan secondary dust collecting systems of some employings.Single blower fan primary dust removing system major equipment is pulsed jet cloth filter and induced draft fan, and single blower fan secondary dust collecting system major equipment is tornado dust collector, pulsed jet cloth filter and induced draft fan; Two blower fan secondary dust collecting system major equipments are that tornado dust collector and induced draft fan are that primary dust removing, pulsed jet cloth filter and induced draft fan are two-stage dust removal.No matter primary dust removing system or secondary dust collecting system dust removing effects can reach national dust discharge standard.So the less power consumption of primary dust removing systemic resistance is relatively less, but because the contained dust granules of waste gas that goes out preheater is no matter size all enters sack cleaner, to cloth bag, wearing and tearing have reduced greatly cloth bag duration of service to the larger dust of particle.Secondary dust collecting system is because the larger power consumption of systemic resistance is also larger, but the dust that goes out the contained larger particles of preheater waste gas enters sack cleaner after primary dust removing is collected, and therefore less to the wearing and tearing of cloth bag, cloth bag is longer work-ing life.Different dust collecting process systems respectively have relative merits.Go out approximately 250 ℃ of left and right of spent air temperture of preheater simultaneously, and sack cleaner working temperature is 180 ℃, for reaching the requirement of sack cleaner working temperature, in waste gas, mixing freezing air makes spent air temperture drop to 180 ℃, strengthen artificially exhausted air quantity, cause lectotype selection maximization, also increased the power consumption of system.
Design out not dilution air of preheater waste gas, can reduce again flue-gas temperature and can collect larger particles dust in flue gas, the dust collecting process system that systemic resistance is less, to project, minimizing is invested, reduces production costs significant.
Summary of the invention
The object of the invention is for save energy, reduce production costs, spy provides a kind of lime production line kiln tail ventilation system and kiln tail ventilation technique.
The invention provides a kind of lime production line kiln tail ventilation system, it is characterized in that: described lime production line kiln tail ventilation system, comprise rotary kiln 1, shaft preheater 2, preheater top feed bin 3, output airduct 4, air cooling inertia-gravity disconnector 5, input fly-ash separator airduct 6, fiber bag precipitator 7, induced draft fan 8, chimney 9;
Wherein: shaft preheater 2 is arranged on the top of rotary kiln 1, preheater top feed bin 3 is arranged on the top of shaft preheater 2; Shaft preheater 2 is connected with air cooling inertia-gravity disconnector 5 by output airduct 4; Air cooling inertia-gravity disconnector 5 is connected with fiber bag precipitator 7 by input fly-ash separator airduct 6; Fiber bag precipitator 7 is connected with induced draft fan 8, and chimney 9 is arranged on induced draft fan 8.
Described rotary kiln 1 is 5 × 70 meters of rotary kilns.
A kiln tail ventilation technique that adopts lime production line kiln tail ventilation system, is characterized in that: described kiln tail ventilation technique is that the waste heat being produced by rotary kiln 1 enters shaft preheater 2 makes material carry out preheating; The waste gas that contains many kinds of substance and dust after preheating material is exported from output airduct 4, waste gas enters air cooling inertia-gravity disconnector 5, in air cooling inertia-gravity disconnector 5, process and macrobead is departed from and obtain cooling by ginseng cold wind, depart from the cooled gas of particle and enter fiber bag precipitator 7 by input fly-ash separator airduct 6 again, the gas after dedusting is up to standard is discharged through chimney 9 by induced draft fan 8; The dust granule of discharging via air cooling inertia-gravity disconnector 5 and fiber bag precipitator 7 enters lower road equipment dedusting ash Send out pump and reclaims.
Technical characterstic is dilution air in thermotropism flue gas not, and spent air temperture is down to 180 ℃ by 250 ℃, has reduced system exhaust smoke level; The resistance of system is only than the large 100P of primary dust removing system in the past
a, the power of system does not increase; Waste gas obtains sedimentation through air cooling inertia-gravity disconnector big dust particle, and sack cleaner working strength is low, cloth bag long service life; Due to low the reducing investment outlay of air cooling inertia-gravity disconnector cost; And owing to not making exhaust smoke level reduce use power to dilution air in waste gas, reduce power consumption.Ventilating and purifying air system is smooth and easy, owing to increasing air cooling inertia-gravity disconnector 5 between shaft preheater 2 and fiber bag precipitator 7, dust collection capacity is improved, dust removal installation life, and the precipitation apparatus of increase is manufactured simply, rational in infrastructure.
Advantage of the present invention:
Lime production line kiln tail ventilation system of the present invention and kiln tail ventilation technique, not dilution air of preheater waste gas, flue-gas temperature can be reduced again and larger particles dust in flue gas can be collected, the dust collecting process system that systemic resistance is less, to project, minimizing is invested, reduces production costs significant.The operation of this system, system is not mixed cold wind, does not increase systemic resistance, save energy, has been reduced production cost.
Accompanying drawing explanation
Below in conjunction with drawings and the embodiments, the present invention is further detailed explanation:
Fig. 1 is the ventilating and purifying air system schematic diagram that is added with air cooling inertia-gravity disconnector;
Fig. 2 is air cooling inertia-gravity disconnector device structure schematic diagram;
In figure, 10 is gas approach, and 11 for flue gas accelerates cylinder, and 12 is exhanst gas outlet, and 13 is radiator element, and 14 is stiffening web, and 15 is ash discharging hole.
Embodiment
The invention provides a kind of lime production line kiln tail ventilation system, it is characterized in that: described lime production line kiln tail ventilation system, comprise rotary kiln 1, shaft preheater 2, preheater top feed bin 3, output airduct 4, air cooling inertia-gravity disconnector 5, input fly-ash separator airduct 6, fiber bag precipitator 7, induced draft fan 8, chimney 9;
Wherein: shaft preheater 2 is arranged on the top of rotary kiln 1, preheater top feed bin 3 is arranged on the top of shaft preheater 2; Shaft preheater 2 is connected with air cooling inertia-gravity disconnector 5 by output airduct 4; Air cooling inertia-gravity disconnector 5 is connected with fiber bag precipitator 7 by input fly-ash separator airduct 6; Fiber bag precipitator 7 is connected with induced draft fan 8, and chimney 9 is arranged on induced draft fan 8.
Described rotary kiln 1 is 5 × 70 meters of rotary kilns.
A kiln tail ventilation technique that adopts lime production line kiln tail ventilation system, is characterized in that: described kiln tail ventilation technique is that the waste heat being produced by rotary kiln 1 enters shaft preheater 2 makes material carry out preheating; The waste gas that contains many kinds of substance and dust after preheating material is exported from output airduct 4, waste gas enters air cooling inertia-gravity disconnector 5, in air cooling inertia-gravity disconnector 5, process and macrobead is departed from and obtain cooling by ginseng cold wind, depart from the cooled gas of particle and enter fiber bag precipitator 7 by input fly-ash separator airduct 6 again, the gas after dedusting is up to standard is discharged through chimney 9 by induced draft fan 8; The dust granule of discharging via air cooling inertia-gravity disconnector 5 and fiber bag precipitator 7 enters lower road equipment dedusting ash Send out pump and reclaims.
Technical characterstic is dilution air in thermotropism flue gas not, and spent air temperture is down to 180 ℃ by 250 ℃, has reduced system exhaust smoke level; The resistance of system is only than the large 100P of primary dust removing system in the past
a, the power of system does not increase; Waste gas obtains sedimentation through air cooling inertia-gravity disconnector big dust particle, and sack cleaner working strength is low, cloth bag long service life; Due to low the reducing investment outlay of air cooling inertia-gravity disconnector cost; And owing to exhaust smoke level not being reduced to dilution air in waste gas, reduced use power, reduce power consumption.Ventilating and purifying air system is smooth and easy, owing to increasing air cooling inertia-gravity disconnector 5 between shaft preheater 2 and fiber bag precipitator 7, dust collection capacity is improved, dust removal installation life, and the precipitation apparatus of increase is manufactured simply, rational in infrastructure.
Claims (3)
1. a lime production line kiln tail ventilation system, it is characterized in that: described lime production line kiln tail ventilation system, comprise rotary kiln (1), shaft preheater (2), preheater top feed bin (3), output airduct (4), air cooling inertia-gravity disconnector (5), input fly-ash separator airduct (6), fiber bag precipitator (7), induced draft fan (8), chimney (9);
Wherein: shaft preheater (2) is arranged on the top of rotary kiln (1), preheater top feed bin (3) is arranged on the top of shaft preheater (2); Shaft preheater (2) is connected with air cooling inertia-gravity disconnector (5) by output airduct (4); Air cooling inertia-gravity disconnector (5) is connected with fiber bag precipitator (7) by input fly-ash separator airduct (6); Fiber bag precipitator (7) is connected with induced draft fan (8), and chimney (9) is arranged on induced draft fan (8).
2. according to lime production line kiln tail ventilation system claimed in claim 1, it is characterized in that: described rotary kiln (1) is 5 × 70 meters of rotary kilns.
3. a kiln tail ventilation technique that adopts lime production line kiln tail ventilation system claimed in claim 1, is characterized in that: described kiln tail ventilation technique is that the waste heat being produced by rotary kiln (1) enters shaft preheater (2) makes material carry out preheating; After preheating material, contain the waste gas of many kinds of substance and dust from output airduct (4) output, waste gas enters air cooling inertia-gravity disconnector (5), in air cooling inertia-gravity disconnector (5), process and macrobead is departed from and obtain cooling by ginseng cold wind, depart from the cooled gas of particle and enter fiber bag precipitator (7) by input fly-ash separator airduct (6) again, the gas after dedusting is up to standard is discharged through chimney (9) by induced draft fan (8); The dust granule of discharging via air cooling inertia-gravity disconnector (5) and fiber bag precipitator (7) enters lower road equipment dedusting ash Send out pump and reclaims.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310738409.9A CN103896501B (en) | 2013-12-30 | 2013-12-30 | A kind of lime production line kiln tail ventilation system and kiln tail ventilation technics |
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| CN201310738409.9A CN103896501B (en) | 2013-12-30 | 2013-12-30 | A kind of lime production line kiln tail ventilation system and kiln tail ventilation technics |
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| CN103896501A true CN103896501A (en) | 2014-07-02 |
| CN103896501B CN103896501B (en) | 2016-03-16 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105087942A (en) * | 2015-09-11 | 2015-11-25 | 河北宏贸环保科技有限公司 | Industrial solid waste treatment method and system |
| CN111116063A (en) * | 2019-12-23 | 2020-05-08 | 董武斌 | Method for weakening or eliminating burst of easy-to-powder and difficult-to-calcine limestone |
| WO2020164259A1 (en) * | 2019-02-11 | 2020-08-20 | 江苏中圣园科技股份有限公司 | Rotary lime kiln preheater with efficient flue gas desulfurization |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008027285A2 (en) * | 2006-08-25 | 2008-03-06 | Rossi Robert A | Process and system for producing commercial quality carbon dioxide from high solids lime mud |
| CN101385934A (en) * | 2008-10-17 | 2009-03-18 | 四川兆兴环保科技发展有限公司 | Dust collection method of lime kiln gas in combinative alkali production and special device thereof |
| CN101891405A (en) * | 2010-07-10 | 2010-11-24 | 新兴河北工程技术有限公司 | Active lime production plant |
| CN102661666A (en) * | 2012-04-20 | 2012-09-12 | 南京苏冶钙业技术有限公司 | Tail gas utilization method and tail gas utilization system of rotary lime kiln |
| CN202547358U (en) * | 2012-04-20 | 2012-11-21 | 南京苏冶钙业技术有限公司 | Tail gas utilization system for lime rotary kiln |
-
2013
- 2013-12-30 CN CN201310738409.9A patent/CN103896501B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008027285A2 (en) * | 2006-08-25 | 2008-03-06 | Rossi Robert A | Process and system for producing commercial quality carbon dioxide from high solids lime mud |
| CN101385934A (en) * | 2008-10-17 | 2009-03-18 | 四川兆兴环保科技发展有限公司 | Dust collection method of lime kiln gas in combinative alkali production and special device thereof |
| CN101891405A (en) * | 2010-07-10 | 2010-11-24 | 新兴河北工程技术有限公司 | Active lime production plant |
| CN102661666A (en) * | 2012-04-20 | 2012-09-12 | 南京苏冶钙业技术有限公司 | Tail gas utilization method and tail gas utilization system of rotary lime kiln |
| CN202547358U (en) * | 2012-04-20 | 2012-11-21 | 南京苏冶钙业技术有限公司 | Tail gas utilization system for lime rotary kiln |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105087942A (en) * | 2015-09-11 | 2015-11-25 | 河北宏贸环保科技有限公司 | Industrial solid waste treatment method and system |
| WO2020164259A1 (en) * | 2019-02-11 | 2020-08-20 | 江苏中圣园科技股份有限公司 | Rotary lime kiln preheater with efficient flue gas desulfurization |
| CN111116063A (en) * | 2019-12-23 | 2020-05-08 | 董武斌 | Method for weakening or eliminating burst of easy-to-powder and difficult-to-calcine limestone |
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| CN103896501B (en) | 2016-03-16 |
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