CN1199028A - Wet collecting and dry exhausting method for dust removal of flue gas of vertical cement kiln - Google Patents
Wet collecting and dry exhausting method for dust removal of flue gas of vertical cement kiln Download PDFInfo
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- CN1199028A CN1199028A CN 97105848 CN97105848A CN1199028A CN 1199028 A CN1199028 A CN 1199028A CN 97105848 CN97105848 CN 97105848 CN 97105848 A CN97105848 A CN 97105848A CN 1199028 A CN1199028 A CN 1199028A
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Abstract
A dusting method for flue gas of vertical cement kiln includes dry settling to remove dust particles greater than 20 microns by means of gravitative or centrifugal dusting apparatus and wet dusting by atomized water to remove dust particles less than 20 microns. During the wet dusting process, the atomized clean water is sprayed into atomizing condensing chamber where flue gas is cooled to state in which water vapour is saturated and dust and fine water drops are gathered to form bigger particles for settling.
Description
The present invention relates to a kind of dust-removing and purifying method of cement in vertical kiln discharging flue gas, use in specifically a kind of cement equipment shaft kiln flue gas emission, do not produce dried, the wet method composite dedusting technology of mud, be called for short " the wet row of doing of receiving " method.
Smoke prevention and dust control environment purification, recovery resource, it is the main task of Cement industry efforts at environmental protection, 80% of China's cement output is produced by cement in vertical kiln, cement in vertical kiln will produce a large amount of ash-laden gass in the process of producing cement clinker, this ash-laden gas has big (60-200 ℃) water capacity of range of temperature big (＞70%), the little (d of dust granularity
50＜30 μ m), characteristics such as flue gas corrosion is strong, bring many inconvenience to udst separation work, at present, what domestic flue gas of shaft kiln method for dust removal was common mainly contains four kinds:
1, settling pocket sedimentation dedusting technology: can only reclaim＞dust of 30 μ m, emission concentration does not reach the emission standard of national requirements.
2, whirlwind-glass fibre bag two-stage dust removal technology: dust removing effects can reach the emission standard of national requirements, but insufficient be that facility investment is big, working cost is high, ventilation resistance fears that greatly, especially smoke condensation influences the output of shaft kiln, quality.
3, whirlwind-electric precipitation two-stage dust removal technology, dust removing effects can reach the emission standard of national requirements, insufficient is the chemical corrosion effect that facility investment is big, working cost is high, ventilation resistance greatly, is especially feared flue gas, influence shaft kiln output, quality.
4, wet method (immersion method) dedusting technology, its effect can reach the emission standard of national requirements substantially, invest little, working cost is not too high, production and quality to shaft kiln do not have influence, but the mud that is produced after the dedusting can produce secondary pollution to environment, must set up the treatment of mud device, recycles after water is purified.
The purpose of this invention is to provide that a kind of equipment is simple, technology is reliable, efficiency of dust collection is high, do not influence the flue gas of vertical cement kiln wet collecting and dry exhausting method for dust removal of shaft kiln output and quality.
The objective of the invention is to realize by the following method: adopt dry method sedimentation dedusting and two kinds of composite dedusting methods of water smoke condensation wet method, dry method dust is the dust granules that utilizes dust removal installation sedimentation＞20 μ m such as tornado dust collector or settling pocket fly-ash separator above, water smoke condensation wet dedusting is by ultrasonic atomizer clear water to be atomized into to spray into after the fine water droplets in the atomizing condensing chamber that the shaft kiln ash-laden gas passes through, make to contain＜flue gas of the following dust granules of 20 μ m is cooled to the water vapor state of saturation in the atomizing condensing chamber, and flue gas of shaft kiln allows dust granules and fine water droplets be condensed into larger particles sedimentation recovery under settled effect in cooling dewfall process thereupon.After the dedusting, most fine mist with saturated vapor with the flue gas after being purified emptying, dust granules humidity after sedimentation is reclaimed increases not obvious, thereby do not have mud and produce, the secondary pollution of having avoided wet dedusting in the past to produce a large amount of mud, the grit after the recovery can be used as raw material and reuses.
Accompanying drawing 1 is to use the settling pocket fly-ash separator to form the structural representation of dust-removal system in the flue gas of vertical cement kiln wet collecting and dry exhausting method for dust removal;
Accompanying drawing 2 is to use tornado dust collector to form the structural representation of sedimentation dust-removal system in the flue gas of vertical cement kiln wet collecting and dry exhausting method for dust removal.
Below with reference to Figure of description flue gas of vertical cement kiln wet collecting and dry exhausting method for dust removal of the present invention being done Explain.
Flue gas of vertical cement kiln wet collecting and dry exhausting method for dust removal of the present invention adopts dry method sedimentation dedusting and water Two kinds of method composite dedustings of mist condensation wet dedusting, dry method dust be utilize the dry method gravitational precipitator or The dust granules of centrifugal deduster sedimentation＞20 μ m, water smoke condensation wet dedusting is by ultrasonic Atomizer atomizes water into and sprays into after the fine water droplets in the atomizing condensation chamber that flue gas passes through, contain＜2 The flue gas of 0 μ m dust granules is cooled to the water vapour saturation state in the atomizing condensation chamber, thereupon powder Dirt particle and fine water droplets are condensed into larger particles sedimentation under the effect of sedimentation and reclaim.
It is to be made of dry method sedimentation fly-ash separator 1 and atomizing condensing chamber 2 that the wet receipts of flue gas are done eliminating dirt equipment, the smoke outlet that advances mouth and shaft kiln of dry method sedimentation fly-ash separator 1 joins, the smoke outlet of dry method sedimentation fly-ash separator 1 joins with the mouth that advances of atomizing condensing chamber 2, the smoke outlet and the chimney of atomizing condensing chamber 2 join, and the lower end of dry method sedimentation fly-ash separator 1 and atomizing condensing chamber 2 is provided with awl property funnel and worm conveyor 3 joins.
The atomizing condensing chamber 2 the centre be provided with a baffle plate 4, the atomizing condensing chamber 2 the bottom be provided with horizontal spraying gun shower nozzle 5, the atomizing condensing chamber 2 top flue gas ingress be provided with vertical spraying gun shower nozzle 6.
Dry method sedimentation fly-ash separator 1 can be tornado dust collector or settling pocket fly-ash separator.
Embodiment:
Flue gas of vertical cement kiln wet collecting and dry exhausting method for dust removal of the present invention, it manipulates very simple and convenient, installs shown in the by specification accompanying drawing to get final product.
Flue gas of vertical cement kiln wet collecting and dry exhausting method for dust removal of the present invention is compared with existing technology, and has following characteristics:
1, detergent power is strong: dust emission concentration is less than 100mg/m3, flue gas desulfurization meets Standard.
2, non-secondary pollution: because fine water droplets is littler more than 10 times than common dedusting size droplet diameter, Be suspended in the flue gas, so, mud does not appear during depositing dust work.
3, operating cost is low: fine water-spray is very little to the flowing resistance impact. Chimney pulls out wind namely naturally Can, needn't set up exhaust blower.
4, reduced investment: ten thousand yuan of the gross investment 5-20 of system (deciding according to field condition).
5, the technology service is good: this method for dust removal does not have particular requirement to shaft kiln calcination, and controlled variable can change with production technique.
Cement in vertical kiln method for dust removal versatility of the present invention is good, and the cement in vertical kiln of various models all can use, thereby, have good value for applications.
Claims (4)
1. flue gas of vertical cement kiln wet collecting and dry exhausting method for dust removal, comprise dry method sedimentation dedusting and water smoke condensation wet dedusting, it is characterized in that dry method sedimentation dedusting is the dust granules that utilizes dry method gravitational precipitator or centrifugal deduster sedimentation＞20 μ m, water smoke condensation wet dedusting is by ultrasonic atomizer clear water to be atomized into to spray into after the fine water droplets in the atomizing condensing chamber that flue gas passes through, contain＜flue gas of 20 μ m dust granules is cooled to the water vapor state of saturation in the atomizing condensing chamber, and dust granules and fine water droplets are condensed into larger particles sedimentation recovery under settled effect thereupon.
2. flue gas of vertical cement kiln wet collecting and dry exhausting method for dust removal according to claim 1, it is characterized in that it is to be made of dry method sedimentation fly-ash separator and atomizing condensing chamber that the wet receipts of flue gas are done eliminating dirt equipment, the smoke outlet that advances mouth and shaft kiln of dry method sedimentation fly-ash separator joins, the smoke outlet of dry method sedimentation fly-ash separator joins with the mouth that advances of atomizing condensing chamber, the smoke outlet and the chimney of atomizing condensing chamber join, and the lower end of dry method sedimentation fly-ash separator and atomizing condensing chamber is provided with awl property funnel and worm conveyor joins.
3. flue gas of vertical cement kiln wet collecting and dry exhausting method for dust removal according to claim 2, it is characterized in that being provided with a baffle plate in the centre of atomizing condensing chamber, the atomizing condensing chamber the bottom be provided with horizontal spraying gun shower nozzle, the atomizing condensing chamber top flue gas ingress be provided with vertical spraying gun shower nozzle.
4. flue gas of vertical cement kiln wet collecting and dry exhausting method for dust removal according to claim 2 is characterized in that dry method sedimentation fly-ash separator can be tornado dust collector or settling pocket fly-ash separator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97105848A CN1061636C (en) | 1997-05-13 | 1997-05-13 | Wet collecting and dry exhausting method for dust removal of flue gas of vertical cement kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97105848A CN1061636C (en) | 1997-05-13 | 1997-05-13 | Wet collecting and dry exhausting method for dust removal of flue gas of vertical cement kiln |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1199028A true CN1199028A (en) | 1998-11-18 |
| CN1061636C CN1061636C (en) | 2001-02-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97105848A Expired - Fee Related CN1061636C (en) | 1997-05-13 | 1997-05-13 | Wet collecting and dry exhausting method for dust removal of flue gas of vertical cement kiln |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101912709A (en) * | 2010-08-06 | 2010-12-15 | 瓮福（集团）有限责任公司 | Method for removing dust from tail gas of ammonium phosphate production by waste steam |
| CN102247708A (en) * | 2011-07-19 | 2011-11-23 | 北京北科环境工程有限公司 | Process for treating tail gas of rare earth mineral powder and concentrated sulphuric acid roasting process |
| CN102266695A (en) * | 2010-06-07 | 2011-12-07 | 伍宏斌 | Ultrasonic water mist dust collector |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100404991C (en) * | 2008-02-03 | 2008-07-23 | 江苏中科节能环保技术有限公司 | Macrotype cement kiln flue gas managing technique and device thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1076917A (en) * | 1992-03-28 | 1993-10-06 | 浙江省嘉兴水泥厂分厂 | Suspension after water dusting for mechanical vertical kiln utilizes technology |
-
1997
- 1997-05-13 CN CN97105848A patent/CN1061636C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102266695A (en) * | 2010-06-07 | 2011-12-07 | 伍宏斌 | Ultrasonic water mist dust collector |
| CN101912709A (en) * | 2010-08-06 | 2010-12-15 | 瓮福（集团）有限责任公司 | Method for removing dust from tail gas of ammonium phosphate production by waste steam |
| CN101912709B (en) * | 2010-08-06 | 2011-12-07 | 瓮福（集团）有限责任公司 | Method for removing dust from tail gas of ammonium phosphate production by waste steam |
| CN102247708A (en) * | 2011-07-19 | 2011-11-23 | 北京北科环境工程有限公司 | Process for treating tail gas of rare earth mineral powder and concentrated sulphuric acid roasting process |
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| Publication number | Publication date |
|---|---|
| CN1061636C (en) | 2001-02-07 |
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