CN101108389A - Dry method dust collecting technique for ferromolybdenum smelting flue gas - Google Patents
Dry method dust collecting technique for ferromolybdenum smelting flue gas Download PDFInfo
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- CN101108389A CN101108389A CNA2007100124983A CN200710012498A CN101108389A CN 101108389 A CN101108389 A CN 101108389A CN A2007100124983 A CNA2007100124983 A CN A2007100124983A CN 200710012498 A CN200710012498 A CN 200710012498A CN 101108389 A CN101108389 A CN 101108389A
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- flue gas
- dry method
- ferromolybdenum
- dust collecting
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Abstract
The invention relates to a dry dust collection process for ferromolybdenum smelting smoke, which solves the problems in the prior wet dust collection process such as the low dust collection efficiency, the smoke being unable to meet the environment protection requirements, the unstable system operation and the serious erosion on the fan and the pipeline equipment, and the difficult in storing the recycled material, etc. The invention comprises the following: the smoke produced by the ferromolybdenum smelting furnace enters into a U-like cooler to naturally cool down through a smoke collecting skirt, and the dust is collected through a bag dust collector and discharged in a way compliant with applicable standards; dust materials collected by the bag falls into a dust hopper of the bag dust collector by pulse spraying and blowing, and is used for smelting ferromolybdenum; after the dust collection, the smoke is transferred through a fan into a chimney to be evacuated. The invention has the advantages of the low investment, the low operating expense, the obvious economic and environment benefit, and the rapid return on investment, above 99.9% material recovery; the discharged gas can meet the requirements of environment protection; the management is convenient, the operation is simple and the running is stable; the erosion on the fan and the pipeline equipment is low, the service life of the equipment is prolonged; the dry powder material can be recycled directly and is easy to pile up; the processing and the mating are easy, the footprint of the project is low and is easy to arrange.
Description
Technical field
The present invention be more particularly directed to a kind of dry method dust collecting technique for ferromolybdenum smelting flue gas.
Background technology
Molybdenum-iron is smelted and is belonged to the perrin process smelting process for production.Molybdenum-iron production is that auxiliary materials such as molybdenum oxide and aluminium powder, nitre, ferrosilicon, splashings, fluorite are prepared burden according to a certain percentage, and lighting material in smelting furnace carries out smelting, makes molybdenum-iron.
Ferro-aluminum smelting reaction is very fast, fierce, reaction time 5～8min, and course of reaction makes molybdenum oxide and iron form ferro-molybdenum by the heat that the aluminium powder burning produces, and entire reaction course produces a large amount of high temperature, high dust content flue gas.The various raw materials that dust in flue gas is smelted usefulness by molybdenum-iron are formed, and cost an arm and a leg, and can be used for smelting production molybdenum-iron.As not administered recovery, then production place flue dust fills the air and influences to hundreds of rice, contaminated environment, serious waste of resources.
At present, molybdenum-iron is smelted the wet processing process (technological process as shown in Figure 1) that the smelting reason technology of gathering dust mainly adopts venturi scrubber+eluting column, flue gas during smelting at first enters venturi scrubber through the gas skirt capture and carries out wet dedusting, enter eluting column then and remove the dust-laden drop that flue gas carries in by venturi scrubber through water wash, clean gas advances smoke stack emission through blower fan; The dust-containing water that Venturi tube and eluting column produce enters sedimentation basin and carries out precipitation process, and the particulate dust that precipitates is reclaimed in periodic cleaning.Dedusting in the system recycles by the water pump water and does not efflux, and the water of loss adds water purification and replenishes.
There are the following problems for this technology:
1) dust-collecting efficiency is low, discharging kind of dust height, and material runs off in a large number, and flue gas does not reach the emission request of country or local environmental administration.
2) spray equipment of installing in Venturi tube and the eluting column easily stops up, and system's fluctuation of service needs often cleaning to safeguard that workload is big.
3) treated flue gas with water is to blower fan and pipe-line equipment seriously corroded.
4) material of Hui Shouing is moisture, is difficult for storing up; Need dry the processing during reuse.
5) solable matter enters in the water, as deals with improperly and pollute the environment.
Summary of the invention
The objective of the invention is to solve the problems referred to above that prior art exists, a kind of technological process that simplifies is provided, the dust-collecting efficiency height, system is stable, need not often cleaning safeguards, little to blower fan and pipe-line equipment corrosion, the particulate dust of recovery is easily stored up, and makes discharging dust in flue gas concentration reach the dry method dust collecting technique for ferromolybdenum smelting flue gas of country or the requirement of local environmental administration.
The present invention is achieved in that flue gas that the molybdenum-iron smelting furnace produces enters U type pipe cooler and cools naturally after gas skirt captures, through sack cleaner gather dust processing, qualified discharge then; The particulate dust that cloth bag takes down falls into the dust-precipitator ash bucket through the pulse winding-up, is back to smelt to produce molybdenum-iron, and the back flue gas that gathers dust is sent into the chimney emptying by blower fan.
Above-mentioned dry method dust collecting technique for ferromolybdenum smelting flue gas, described gas skirt air inlet sectional area is got 3～4 times of smelting furnace sectional area suitable for reading, the gas skirt installation site is apart from fire door 0.8～1.2m place, so that exhaust air rate reaches minimum, to reduce the postorder equipment manufacturing cost directly over the smelting furnace.
Above-mentioned dry method dust collecting technique for ferromolybdenum smelting flue gas, gas skirt inlet gas speed is 1～2.5m/s, so that smelting smoke dust is not excessive, does not pollute production environment.
Above-mentioned dry method dust collecting technique for ferromolybdenum smelting flue gas, the area of dissipation of U type cooling tube satisfy flue-gas temperature and drop to 120～250 ℃, and resistance is controlled at 800～1200Pa, can guarantee not dewfall of flue gas, make bagroom stability strong, and are convenient to select cloth bag.
Above-mentioned dry method dust collecting technique for ferromolybdenum smelting flue gas, the cloth bag filtration velocity is got 1～1.2m/min, and resistance is controlled at 1600～1800Pa, so that bagroom performance maximum efficiency.
Above-mentioned dry method dust collecting technique for ferromolybdenum smelting flue gas, pulse jet air supply 2.5～3.0m
3/ min, pressure are 0.5～0.7MPa, and winding-up is 3-6s at interval, and pulse width 0.1～0.2s is to guarantee the cloth bag ash-removal effect.
Above-mentioned dry method dust collecting technique for ferromolybdenum smelting flue gas, described blower fan adopts boiler induced-draft fan, and the blower fan total head is got 3300～4000Pa., and air quantity is got U type cooler outlet operating mode tolerance, to overcome the preorder equipment resistance.
Above-mentioned dry method dust collecting technique for ferromolybdenum smelting flue gas, gas skirt can adopt umbrella hood, and the cross section is square or circular.
Beneficial effect of the present invention:
1) investment is low, and operating cost is little.Flue gas trapping amount by this technical scheme design is little, and does not have flue gas excessive when smelting.Stingy amount has determined bagroom, blower fan small scale, has determined that investment and operating cost are low.
2) economy, environmental benefit are obvious, and gain quick return in investment.This technological process is simple, the material organic efficiency is up to more than 99.9%, and yield is big, and gain quick return in investment; The discharging flue gas reaches environmental requirement, has alleviated environmental pollution, not only has an economic benefit but also environmental benefit is arranged.
3) convenient management, simple to operate, stable, need not often cleaning and safeguard.The system process parameter is fixed on the certain numerical value after qualified in debugging, only blower fan and air compressor machine is started shut-down operation when moving later on and gets final product.
3) there is not the introducing of water in the dry process, little to blower fan and pipe-line equipment corrosion, prolonged service life of equipment, directly reclaim dry material, reclaim the back material and easily stack.
4) process mating is easy.Lectotype selection is common equipment, is easy to process mating.
5) project occupation of land is little, is subjected to constraint based on sites little, is easy to arrange.
Description of drawings:
Fig. 1 is that existing molybdenum-iron is smelted the smelting reason processing technological flow figure that gathers dust;
Fig. 2 is a process chart of the present invention.
The specific embodiment
Embodiment 1:
As shown in Figure 2, the flue gas that the molybdenum-iron smelting furnace produces enters U type pipe cooler and cools naturally after gas skirt captures, and gas skirt can adopt umbrella hood, and the cross section is square or circular.Gas skirt air inlet sectional area is got 3～4 times of smelting furnace sectional area suitable for reading, and the cover body height designs with reference to the relevant design handbook.The gas skirt installation site is apart from fire door 0.8～1.2m place directly over the smelting furnace.Gas skirt inlet gas speed is 1～2.5m/s.This moment, import department's flue-gas temperature was 500～700 ℃, and containing dust concentration is 80～100g/mN
3U type cooler can be arranged according to engineering place actual conditions.The design area of dissipation should make flue-gas temperature drop to 120～250 ℃, and resistance is controlled at 800～1200Pa, with convenient cheap cloth bag and the blower fan selected.
Through the sack cleaner processing of gathering dust, dust concentration is bigger in the flue gas again, and the cloth bag filtration velocity is got 1～1.2m/min.Resistance is controlled at 1600～1800Pa.
Qualified discharge then; The particulate dust that cloth bag takes down falls into the dust-precipitator ash bucket through the pulse winding-up, is back to smelt to produce molybdenum-iron, and the back flue gas that gathers dust is sent into the chimney emptying by blower fan.Pulse jet air supply 2.5～3.0m
3/ min, pressure are 0.5～0.7MPa, and winding-up is 3-6s at interval, pulse width 0.1～0.2s.Therefore the flue-gas temperature of air intake machine should select boiler induced-draft fan to be advisable more than 120 ℃.The blower fan total head is got 3300～4000Pa, and air quantity is got U type cooler outlet operating mode tolerance, and this tolerance can be calculated by the equation of gaseous state of perfect condition gas and obtain.
Embodiment 2:
The flue gas that the molybdenum-iron smelting furnace produces enters U type pipe cooler and cools naturally after gas skirt captures, molybdenum-iron smelting furnace back cut diameter is φ 2.0m.Gas skirt can adopt umbrella hood, and the cross section is square or circular.Get gas skirt import sectional area and be fire door 3.5 times, determine that the gas skirt inlet size is 3.32m * 3.32m, setting height(from bottom) is 1.0m, inlet gas speed is got 2.0m/s.This moment, collection cover input gas temperature was 650 ℃, and exhaust gas volumn is 23500mN
3/ h.
U type cooler can be arranged according to engineering place actual conditions.The design area of dissipation should make flue-gas temperature drop to 120～250 ℃, and resistance is controlled at 900～1100Pa.With convenient cheap cloth bag and the blower fan selected.
Through the sack cleaner processing of gathering dust, dust concentration is bigger in the flue gas again, and the sack cleaner filtration velocity is got 1.0m/s, and resistance is controlled at 1600～1800Pa, and then the filter cloth area is 600m
2
Qualified discharge then; The particulate dust that cloth bag takes down falls into the dust-precipitator ash bucket through the pulse winding-up, is back to smelt to produce molybdenum-iron, and the back flue gas that gathers dust is sent into the chimney emptying by blower fan.Pulse jet compressed air is measured 2.7m
3/ min, pressure are 0.5～0.7MPa, and winding-up is 3-6s at interval, pulse width 0.1～0.2s.Can cause the jetting pressure deficiency when jetting pressure is lower than 0.5MPa, the cloth bag deashing is unclean, and the cloth bag inside and outside differential pressure is increased, and dust is forced through cloth bag and drains with flue gas under pressure; When jetting pressure can destroy the dust bonding layer during greater than 0.7MPa, dust collection rate is reduced.Therefore the flue-gas temperature of air intake machine should select boiler induced-draft fan to be advisable more than 120 ℃.The blower fan total head is got 3500Pa, and air quantity is got U type cooler outlet operating mode tolerance, and this tolerance can be calculated by the equation of gaseous state of perfect condition gas and obtain.
Claims (8)
1. dry method dust collecting technique for ferromolybdenum smelting flue gas is characterized in that: the flue gas that the molybdenum-iron smelting furnace produces enters U type pipe cooler and cools naturally after gas skirt captures, through sack cleaner gather dust processing, qualified discharge then; The particulate dust that cloth bag takes down falls into the dust-precipitator ash bucket through the pulse winding-up, is back to smelt to produce molybdenum-iron, and the back flue gas that gathers dust is sent into the chimney emptying by blower fan.
2. dry method dust collecting technique for ferromolybdenum smelting flue gas according to claim 1 and 2 is characterized in that: described gas skirt air inlet sectional area is got 3～4 times of smelting furnace sectional area suitable for reading, and the gas skirt installation site is apart from fire door 0.8～1.2m place directly over the smelting furnace.
3. dry method dust collecting technique for ferromolybdenum smelting flue gas according to claim 1 and 2 is characterized in that: gas skirt inlet gas speed is 1～2.5m/s.
4. dry method dust collecting technique for ferromolybdenum smelting flue gas according to claim 1 is characterized in that: the area of dissipation of U type cooling tube satisfies flue-gas temperature and drops to 120～250 ℃, and resistance is controlled at 800～1200Pa.
5. dry method dust collecting technique for ferromolybdenum smelting flue gas according to claim 1 is characterized in that: the cloth bag filtration velocity is got 1～1.2m/min, and resistance is controlled at 1600～1800Pa.
6. dry method dust collecting technique for ferromolybdenum smelting flue gas according to claim 1 is characterized in that: pulse jet air supply 2.5～3.0m
3/ min, pressure are 0.5～0.7MPa, and winding-up is 3-6s at interval, pulse width 0.1～0.2s.
7. dry method dust collecting technique for ferromolybdenum smelting flue gas according to claim 1 is characterized in that: described blower fan adopts boiler induced-draft fan, and the blower fan total head is got 3300～4000Pa., and air quantity is got U type cooler outlet operating mode tolerance.
8. dry method dust collecting technique for ferromolybdenum smelting flue gas according to claim 1 is characterized in that: gas skirt can adopt umbrella hood, and the cross section is square or circular.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100124983A CN101108389A (en) | 2007-08-17 | 2007-08-17 | Dry method dust collecting technique for ferromolybdenum smelting flue gas |
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| CNA2007100124983A CN101108389A (en) | 2007-08-17 | 2007-08-17 | Dry method dust collecting technique for ferromolybdenum smelting flue gas |
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| CN101108389A true CN101108389A (en) | 2008-01-23 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102772958A (en) * | 2012-06-07 | 2012-11-14 | 江阴市盛凯环保设备有限公司 | Integrated smoke hood dust collector |
| CN105784565A (en) * | 2016-04-05 | 2016-07-20 | 中国重型机械研究院股份公司 | Estimation method for air resistance of filter material of high-vacuum cloth bag filter |
| CN108379955A (en) * | 2018-05-03 | 2018-08-10 | 佛山琴笙科技有限公司 | A kind of twin-tub cloth bag vacuum cleaner dust absorption passage mechanism |
| CN110093509A (en) * | 2019-04-30 | 2019-08-06 | 金堆城钼业股份有限公司 | A method of utilizing the cigarette ash of bulk containing molybdenum Smelting Ferromolybdenum |
| CN112296056A (en) * | 2020-10-20 | 2021-02-02 | 河北中科朗博环保科技有限公司 | Multifunctional gas collecting hood for slag disintegrating pool |
-
2007
- 2007-08-17 CN CNA2007100124983A patent/CN101108389A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102772958A (en) * | 2012-06-07 | 2012-11-14 | 江阴市盛凯环保设备有限公司 | Integrated smoke hood dust collector |
| CN105784565A (en) * | 2016-04-05 | 2016-07-20 | 中国重型机械研究院股份公司 | Estimation method for air resistance of filter material of high-vacuum cloth bag filter |
| CN105784565B (en) * | 2016-04-05 | 2019-06-18 | 中国重型机械研究院股份公司 | A kind of evaluation method of high vacuum cloth envelop collector filtrate air resistance |
| CN108379955A (en) * | 2018-05-03 | 2018-08-10 | 佛山琴笙科技有限公司 | A kind of twin-tub cloth bag vacuum cleaner dust absorption passage mechanism |
| CN108379955B (en) * | 2018-05-03 | 2020-11-27 | 桐乡市舒适家具有限公司 | Dust collection channel mechanism of double-barrel cloth bag dust collector |
| CN110093509A (en) * | 2019-04-30 | 2019-08-06 | 金堆城钼业股份有限公司 | A method of utilizing the cigarette ash of bulk containing molybdenum Smelting Ferromolybdenum |
| CN112296056A (en) * | 2020-10-20 | 2021-02-02 | 河北中科朗博环保科技有限公司 | Multifunctional gas collecting hood for slag disintegrating pool |
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