CN101554558A - Dynamic wave wet dust collection technology of non-ferrous metallurgical furnace - Google Patents
Dynamic wave wet dust collection technology of non-ferrous metallurgical furnace Download PDFInfo
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- CN101554558A CN101554558A CN 200910094450 CN200910094450A CN101554558A CN 101554558 A CN101554558 A CN 101554558A CN 200910094450 CN200910094450 CN 200910094450 CN 200910094450 A CN200910094450 A CN 200910094450A CN 101554558 A CN101554558 A CN 101554558A
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Abstract
The invention relates to a dynamic wave wet dust collection technology of a non-ferrous metallurgical furnace, which adopts a dynamic wave tower and a wet electrostatic mist eliminator for dust collection process. The technology is characterized in that a three-stage wet dust collection system is used for processing high-temperature flue gas discharged from a non-ferrous metallurgical furnace; the first stage adopts a primary dynamic wave tower for removing over 4 micrometer liquid drop containing dust; the second stage adopts a secondary dynamic wave tower for removing 3 to 4 micrometer liquid drop containing dust; and the third stage adopts a wet electrostatic mist eliminator for removing below 3 micrometer liquid drop containing dust. The technology has the advantages that the dust collection efficiency is greatly improved, the content of dust in discharged tail gas totally meet new national standards by further processing the filter liquor and flue dust, the recycle level of valuable elements of Ag and Se is improved, and the damage of noxious gas to environment and workers is reduced to the minimum.
Description
One, technical field
The present invention relates to nonferrous smelting industry environmental protection field, especially a kind of dynamic wave wet dust collection technology of non-ferrous metallurgical furnace.
Two, technical background
At present, the dust collecting system that relates to noble metal production pyrometallurgical smelting relies on mostly to be finished by pulsed bag collection system, because pyrometallurgical smelting belongs to the loop cycle operation, in a smelting cycle, can not keep the fluctuation of flue-gas temperature all to be higher than flue gas dew point, cause flue gas dewfall in pipeline and bagroom easily, and then make system jams, form the low latitude smoke pollution.My unit adopts non-ferrous metallurgical furnace copper smelting electrolysis anode sludge, contain higher Se and moisture in the raw material, easier bonding pipeline and cloth bag during dewfall cause the whole system resistance to increase, and draft reduces, dust collection pipe often stops up, particularly caking is difficult to mediation after the flue gas moisture absorption, and it is big to make fire door escape exhaust gas volumn, causes serious low vacancy pollution, influence to environment and worker is very big, and causes bigger precious metal losses.In addition, undesirable because of later stage system's dust collection effect, need frequent replacing cloth bag and auxiliary device thereof, except that influencing ordinary production, the system held expense also constantly rises.
Three, summary of the invention
The objective of the invention is to propose a kind of dynamic wave wet dust collection technology of non-ferrous metallurgical furnace, dynamic wave flue gas washing purifier is directly applied to the non-ferrous metallurgical furnace flue gas dust collection, overcome all deficiencies of the bagroom of prior art, make discharging tail gas dust-laden reach new national standard fully, and the recycling level of raising valuable element Ag and Se, realize the optimization of dressing and smelting united technical indicator.
The technical solution adopted for the present invention to solve the technical problems is: the high-temperature flue gas that non-ferrous metallurgical furnace is discharged, enter the wet dust collector system, and the wet dust collector system adopts three grades and gathers dust, and the first order is an one-level dynamic wave tower, mainly removes the above dust-laden drop of 4 μ m; The second level is second motive force ripple tower, mainly removes the dust-laden drop of 3～4 μ m; The third level is the wet type electrostatic precipitator, mainly removes the following dust-laden drop of 3 μ m.
The invention has the beneficial effects as follows: dust-collecting efficiency improves and greatly by to the further processing of filtrate and flue dust, make discharging tail gas dust-laden reach new national standard fully, and improve the recycling level of valuable element Ag and Se, and pernicious gas is reduced to minimum degree to environment and worker's harm.Conventional dynamic wave system only is applied to low ash-laden gas generally speaking.Flue gas during smelting carries out dust cleaning by the dry type cottrell earlier, and dust contained flue gas is reduced to 300～500mg/Nm
3After, adopt the dynamic wave wet pipe system to purify again, for next step flue gas acid preparing creates conditions.The present invention directly adopts the dynamic wave wet pipe system, and high ash-laden gas is gathered dust and purifies, and is different from conventional dynamic wave dust collecting technique.The high ash-laden gas of the present invention to producing in the pyrogenic process non-ferrous metallurgical furnace smelting process, directly adopt dynamic wave wet dust collection new technological flow to carry out gathering dust and purifying of flue gas, by the mensuration in the actual application, show that blower fan outlet dust contained flue gas can be less than the 100mg/Nm of national regulation
3, pernicious gas in the flue gas such as sulfur dioxide, chlorine are all less than discharging standards.The present invention is applicable to nonferrous smelting enterprise, especially the big smelting enterprise of dustiness, for example flue dust of heavy non-ferrous metal smelting and precious metal smelting enterprise recovery or the like.
Four, description of drawings
Fig. 1 is a process chart of the present invention.
Five, the specific embodiment
According to technology proposed by the invention, set up the technological process of the coloured metallurgical furnace dynamic wave wet dust collection technology of a cover in rare your subsidiary factory of applicant.Capital equipment in this project example is as follows: one of one-level dynamic wave tower specification Φ 650/ Φ 550/ Φ 2000 * 11400mm, one of second motive force ripple tower specification Φ 600/ Φ 2700 * 11000mm, one of electrostatic precipitator, high pressure centrifugal ventilator, one of one, No. two dense groove 4000 * 4000mm of two, No. one dense groove 2500 * 2500mm of van-type plate and frame filter press, big or small clear liquid groove each one and some circulating pumps.
For the high-temperature flue gas that the non-ferrous metallurgical furnace of handling is discharged, dustiness is 5000～8000Nm in the flue dust
3/ h, by centrifugal fan 4 air inducing of 200KW, after gravity settling chamber slightly gathers dust and lowers the temperature, from arrow → shown in direction enter the one-level dynamic wave tower 1 of wet dust collector system, 130～240 ℃ of entrance flue gas temperatures wherein, dust content are 2000～25000mg/Nm
3, SO in the flue gas
2Content is 200～600mg/Nm
3, Cl
2Content is 30～60mg/Nm
3
Technology provided by the present invention is according to the smoke property of non-ferrous metallurgical furnace, consider the abundant recovery of valuable metal simultaneously, the wet dust collector system adopts three grades and gathers dust, and the first order is an one-level dynamic wave tower 1, the second level is second motive force ripple tower 2, and the third level is a wet type electrostatic precipitator 3.In the technology and equipment that is adopted, the circulation duct and the elements such as circulating pump on the pipeline and valve of flue gas, slurry and clear liquid are connected between each equipment by this area routine techniques.
The important technological parameters of controlling among this embodiment is as follows:
Liquid level control:
First order dynamic wave tower 1～2.8m; Second level dynamic wave tower 1～1.4m.
Pressure control:
The contrary nozzle exit pressure 85～130kPa of low level in the first order dynamic wave tower, high-order contrary nozzle exit pressure 10～40kPa; Contrary nozzle exit pressure 220～280kPa in the dynamic wave tower of the second level.
Internal circulating load control:
First order dynamic wave tower 45～90m
3/ h; Second level dynamic wave tower 60～120m
3/ h.
Flue gas flow rate control:
Entering first order dynamic wave tower is 5～9m
3/ h, second level dynamic wave tower is 4～8m
3/ h.
Operation principle of the present invention as shown in Figure 1.From the flue gas that expansion chamber is discharged, 130～240 ℃ of its temperature, and contain a large amount of solid phase floating dusts, gas phase dirt and some pernicious gases etc., and the mechanism of utilizing particulate to capture, this flue gas successively enters firsts and seconds dynamic wave tower successively and handles.In two-stage dynamic wave tower, ash-laden gas and two sections or one section reverse fluid column of sending forth carry out the fierceness collision, make flue gas and cleaning solution fully rapids dash and contact, the subparticle in the flue gas is trapped on the surface of cleaning solution immediately.The above dust-laden drop of 4 μ m is entered cleaning solution by the absorption slurry washing in the one-level dynamic wave tower easily, cleaning solution is concentrated in one-level dynamic wave tower, returns by one-level dynamic wave scrubber circulating pump 10 that one-level dynamic wave tower is handled again then or the sour pump 11 of independent string is drawn concentrate from outlet and entered a dense groove 17 and carry out sedimentation separation.The supernatant of a dense groove generation returns circulation in the one-level dynamic wave tower, underflow then enters the dried dirt that underflow groove 12 and gravity settling chamber collect and mixes the mechanical agitation of sizing mixing, and is sent to No. one and No. two plate and frame filter press 18 and 19 carry out mechanism filter-pressing and make Separation of Solid and Liquid through delivery pump 13 again.Clear liquid after the press filtration enters little clear liquid groove 15, contains Se concentration and reach the recovery requirement in clear liquid, then pumps into selenium reduction operation and handles, if do not reach requirement, then returns second motive force ripple tower by clear liquid circulating pump 14 and further circulates.The flue dust filter cake that contains of No. one and No. two plate and frame filter press enters surge tank 16, after the suitable concentration of sizing mixing, pumps into upstream process and reclaims silver and selenium processing.
Because the core of droplet is a subparticle, therefore the flue gas that contains less than 4 μ m droplets must further capture through second motive force ripple tower.Flue gas fully contacts with having many pulp surface of holding liquid points and bringing in constant renewal in the liquid film surface at second motive force Bo Tanei, uses collision, electrostatic adherence, washing is adhered to and diffusion is adhered to etc. and to be captured mechanism, makes the fog particles diameter less than 4 μ m become big.Be beneficial to further capture.Be provided with efficient drop catcher at second motive force ripple top of tower, capture droplet, increasing the dust-collecting efficiency of second motive force ripple tower, thereby also alleviated the live load of wet type electrostatic precipitator greater than the metal dusting of 3 μ m.
Cleaning solution in the second motive force ripple tower continues to circulate in washer, draws concentrate by second motive force ripple washer circulating pump 7 then and enters No. two dense grooves 21 and carry out sedimentation separation.No. two dense groove supernatant enters big clear liquid groove 22, squeeze into second motive force ripple tower and wet type electrostatic precipitator respectively through second motive force ripple circulating pump 8 and clear liquid circulating pump 9, the underflow of No. two dense grooves enters the underflow groove, is sent to No. one and No. two plate and frame filter press carry out Separation of Solid and Liquid through delivery pump 13 again.
The fog particles that the flue gas of discharging from second motive force ripple tower contains less than 3 μ m metal dustings enters electrostatic precipitator, in high voltage electric field dust charged after, under the effect of electric field force, separately by its charged polarity difference, to opposite polarity electrode movement, and deposit on it, finish the capture of charged dust.Electrostatic precipitator adopts C-FRP wet type electrostatic precipitator, and it has good conductivity, and is corrosion-resistant, fire-retardant, and operating characteristics is stable, demist efficient advantages of higher.Flue gas is after the wet type electrostatic precipitator gathers dust, and total dust-collecting efficiency can reach 99%.Tail gas after the wet type electrostatic precipitator gathers dust, about 35 ℃ of its temperature is sent into 5 emptyings of the high chimney of 30m through air-introduced machine 4.
The flushing liquor of wet type electrostatic precipitator is pumped into one-level dynamic wave tower through flush cycle groove 6.After liquid level in the dust collecting system descends, one-level dynamic wave tower through head tank 20, second motive force ripple tower with 1.5m
3Technology carry out supplementing water to keep level stability.Following table is rare your subsidiary factory's non-ferrous metallurgical furnace dynamic wave wet dust collection indicator-specific statistics:
See that by last table adopt the flue gas after this PROCESS FOR TREATMENT, its dustiness reaches discharge standard.
Claims (5)
1, a kind of dynamic wave wet dust collection technology of non-ferrous metallurgical furnace, with the processing of gathering dust of dynamic wave tower and wet type electrostatic precipitator device, it is characterized in that: the high-temperature flue gas that non-ferrous metallurgical furnace is discharged adopts three grades of wet dust collector systems to handle, the first order is to remove the one-level dynamic wave tower of the above dust-laden drop of 4 μ m, the second level is the second motive force ripple tower of removing 3～4 μ m dust-laden drops, and the third level is a wet type electrostatic precipitator of removing the following dust-laden drop of 3 μ m.
2, wet dust collection technology according to claim 1 is characterized in that: first order dynamic wave tower liquid level is controlled at 1～2.8m; Second level dynamic wave tower liquid level is controlled at 1～1.4m.
3, wet dust collection technology according to claim 1 is characterized in that: the contrary nozzle exit pressure of the low level in the first order dynamic wave tower is controlled at 85～130kPa, and high-order contrary nozzle exit pressure is controlled at 10～40kPa; Contrary nozzle exit pressure in the dynamic wave tower of the second level is controlled at 220～280kPa.
4, wet dust collection technology according to claim 1 is characterized in that: first order dynamic wave tower internal circulating load is controlled at 45～90m
3/ h; Second level dynamic wave tower internal circulating load is controlled at 60～120m
3/ h.
5, wet dust collection technology according to claim 1 is characterized in that: the flue gas flow rate that enters first order dynamic wave tower is controlled at 5～9m
3/ h, the flue gas flow rate that enters second level dynamic wave tower is controlled at 4～8m
3/ h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910094450 CN101554558B (en) | 2009-05-11 | 2009-05-11 | Dynamic wave wet dust collection technology of non-ferrous metallurgical furnace |
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|---|---|---|---|
| CN 200910094450 CN101554558B (en) | 2009-05-11 | 2009-05-11 | Dynamic wave wet dust collection technology of non-ferrous metallurgical furnace |
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| CN101554558A true CN101554558A (en) | 2009-10-14 |
| CN101554558B CN101554558B (en) | 2013-10-09 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105154682A (en) * | 2015-09-25 | 2015-12-16 | 中国瑞林工程技术有限公司 | Smelting smoke conveying device and smelting smoke conveying method |
| CN112374461A (en) * | 2020-11-02 | 2021-02-19 | 攀枝花钢企欣宇化工有限公司 | Washing composite set of magnesium electrolysis chlorine |
| CN112827294A (en) * | 2021-01-07 | 2021-05-25 | 易门铜业有限公司 | Copper smelting flue gas purification method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1238093C (en) * | 2002-03-23 | 2006-01-25 | 南昌有色冶金设计研究院 | Kinetic wave equip for purifying smelting fumes |
| CN2910331Y (en) * | 2005-09-07 | 2007-06-13 | 骆明君 | Composite multi-dimensional high efficiency purifying tower |
-
2009
- 2009-05-11 CN CN 200910094450 patent/CN101554558B/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105154682A (en) * | 2015-09-25 | 2015-12-16 | 中国瑞林工程技术有限公司 | Smelting smoke conveying device and smelting smoke conveying method |
| CN112374461A (en) * | 2020-11-02 | 2021-02-19 | 攀枝花钢企欣宇化工有限公司 | Washing composite set of magnesium electrolysis chlorine |
| CN112827294A (en) * | 2021-01-07 | 2021-05-25 | 易门铜业有限公司 | Copper smelting flue gas purification method |
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| CN101554558B (en) | 2013-10-09 |
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