CN104878203A - Furnace gas stepped temperature-control dust-collection purification technology and equipment - Google Patents
Furnace gas stepped temperature-control dust-collection purification technology and equipment Download PDFInfo
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- CN104878203A CN104878203A CN201410073894.7A CN201410073894A CN104878203A CN 104878203 A CN104878203 A CN 104878203A CN 201410073894 A CN201410073894 A CN 201410073894A CN 104878203 A CN104878203 A CN 104878203A
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Abstract
The invention discloses a furnace gas stepped temperature-control dust-collection purification technology and equipment. The technology comprises the following steps of 1, introducing furnace gas produced by an industrial kiln into a furnace gas stepped temperature-control dust-collection purification device, 2, introducing the furnace gas into a first-grade temperature-control cooling unit of the device, carrying out cooling to precipitate a part of materials to be recovered so that first dust is formed and collecting the first dust by the first-grade temperature-control cooling unit, 3, introducing the first dust-containing furnace gas discharged by the first-grade temperature-control cooling unit into a first-grade gas filtration unit, carrying out dedusting purification and further covering the first dust, 4, introducing furnace gas discharged by the first-grade gas filtration unit into a second-grade temperature-control cooling unit, carrying out cooling to precipitate a part of materials to be recovered so that second dust is formed and collecting the second dust by the second-grade temperature-control cooling unit, and 5, introducing the second dust-containing furnace gas discharged by the second-grade temperature-control cooling unit into a second-grade gas filtration unit, carrying out dedusting purification and further covering the second dust.
Description
Technical field
The present invention relates to a kind of furnace gas graded temperature-control dust cleaning Processes and apparatus.
Background technology
Contriver finds, sometimes containing the gaseous substance that two or more de-sublimation temperature is different in the furnace gas that Industrial Stoves produce, the solid particulate wherein formed after often kind of material cooling just has again independently use value, and current furnace gas processing mode is often merely able to the solid mixture obtaining these materials, this is just for the independent recovery of various solid particulate brings comparatively burden.Such as, (lead anode slurry is the byproduct produced in electrolytic lead refining process to lead anode slurry melting furnace gas, at present mainly through pyrogenic attack technique recovery valuables wherein, need during process to carry out melting to lead anode slurry, thus produce furnace gas) in main component be white arsenic, antimonous oxide (de-sublimation temperature of antimonous oxide is higher than white arsenic), and containing small amounts lead etc., antimony in the dust that this furnace gas is formed after cooling, arsenic content is higher, at present this dust or produce needle antimony and white arsenic respectively by series of steps such as reduction-ball pressure-roastings, or mix also successively through distilling with charcoal, arsenic antimony alloy is produced in condensation, or adopt high pressure water soaking technology, these subsequent treatment process all extremely bother.Certainly, except above-mentioned lead anode slurry melting furnace gas, there is problems in the high-temperature furnace gas of the other fields such as non-ferrous metal metallurgy equally.
Summary of the invention
The technical problem that first the present invention will solve is to provide a kind of furnace gas graded temperature-control dust cleaning technique and the equipment for this technique, for the situation containing the different gaseous state material to be recycled of two or more de-sublimation temperature in the furnace gas that Industrial Stoves produce, treat recover materials and carry out enriching and recovering respectively.
The present invention secondly technical problem to be solved is to provide a kind of lead anode slurry melting high-temperature furnace gas graded temperature-control dust cleaning technique, to obtain white arsenic and the antimonous oxide of higher degree respectively.
The step of furnace gas graded temperature-control dust cleaning technique of the present invention comprises:
1) furnace gas that Industrial Stoves produce is introduced a furnace gas graded temperature-control dust cleaning equipment, containing the gaseous state material to be recycled that at least two kinds of de-sublimation temperature are different in the described furnace gas before introducing this furnace gas graded temperature-control dust cleaning equipment;
2) guaranteeing, under the temperature condition that gaseous state material to be recycled is not separated out substantially, described furnace gas to be introduced the first step temperature control cooling unit in this equipment, making part material cooling to be recycled separate out formation first dust and be collected in first step temperature control cooling unit;
3) guaranteeing under the temperature condition that gaseous state material to be recycled is not separated out substantially, first step temperature control cooling unit is being discharged and carries in the furnace gas introducing first step filtering unit of the first dust and carry out udst separation and collect further obtaining the first dust;
4) guaranteeing under the temperature condition that gaseous state material to be recycled is not separated out substantially, the furnace gas of being discharged by first step filtering unit introduces second stage temperature control cooling unit, makes part material cooling to be recycled separate out formation second dust and be collected in the temperature control cooling unit of the second stage;
5) guaranteeing under the temperature condition that gaseous state material to be recycled is not separated out substantially, second stage temperature control cooling unit is being discharged and carries in the furnace gas introducing second stage filtering unit of the second dust and carry out udst separation and collect further obtaining the second dust;
The first dust that above-mentioned collection obtains is the dust being enriched with described a kind of material to be recycled, and the second dust is the dust being enriched with described a kind of material to be recycled, and second stage filtering unit expellant gas enters subsequent recovery process or discharge.
It may be noted that the subsequent recovery process carried out by second stage filtering unit expellant gas, comprise the situation continuing on the basis of the above-described procedure to adopt next stage or multistage temperature control cooling unit and filtering unit to process furnace gas.
For the furnace gas graded temperature-control dust cleaning equipment of above-mentioned technique, comprising:
First step temperature control cooling unit, the furnace gas of the gaseous state to be recycled material different containing at least two kinds of de-sublimation temperature that described first step temperature control cooling unit receives that Industrial Stoves produce, and will wherein part material cooling to be recycled separate out formation first dust and be collected in first step temperature control cooling unit;
First step filtering unit, described first step filtering unit receives the furnace gas carrying the first dust of first step temperature control cooling unit discharge, and collects further by carrying out udst separation to this furnace gas and obtain the first described dust;
Second stage temperature control cooling unit, described second stage temperature control cooling unit receives the furnace gas of first step filtering unit discharge, and will wherein part material cooling to be recycled separate out formation second dust and be collected in the temperature control cooling unit of the second stage;
Second stage filtering unit, described second stage filtering unit receives the furnace gas carrying the second dust of second stage temperature control cooling unit discharge, and collects further by carrying out udst separation to this furnace gas and obtain the second described dust; And
Power set, the furnace gas that described power set drives Industrial Stoves to produce is successively by first step temperature control cooling unit, first step filtering unit, second stage temperature control cooling unit and second stage filtering unit;
Wherein, furnace gas Industrial Stoves, first step temperature control cooling unit, first step filtering unit, transmit between second stage temperature control cooling unit and the second stage filtering unit time remain on the state of temperature that gaseous state material to be recycled is not separated out substantially under; First dust is the dust being enriched with described a kind of material to be recycled, and the second dust is the dust being enriched with described a kind of material to be recycled.
In above-mentioned Processes and apparatus, temperature control cooling unit has following function: the temperature that the first, can control its outlet furnace gas; The second, can the dust that cooling is separated out be collected.In order to reach above-mentioned functions, temperature control cooling unit can adopt the gravitational precipitator through transformation, namely on gravitational precipitator, increase the device (injection rate of cold gas is according to the setting of gravitational precipitator temperature out) of the cold gas such as in the furnace gas entering this gravitational precipitator nitrogen injection, thus gather dust in the lump in temperature-fall period.Because temperature control cooling unit is difficult to accomplish accurate dedusting, therefore above-mentioned Processes and apparatus is also provided with filtering unit after temperature control cooling unit, to improve the rate of recovery to dust.In a word, above-mentioned Processes and apparatus is adopted can to carry out enriching and recovering respectively by the material to be recycled different to two or more de-sublimation temperature.
On the basis of above-mentioned furnace gas graded temperature-control dust cleaning technique, when the furnace gas that Industrial Stoves produce is the lead anode slurry melting furnace gas of temperature 600-900 DEG C, the material to be recycled of gaseous state is wherein respectively antimonous oxide and white arsenic; Furnace gas graded temperature-control dust cleaning equipment only can be provided with the two-stage temperature control cooling unit comprising first step temperature control cooling unit and second stage temperature control cooling unit, the furnace gas export temperature of first step temperature control cooling unit controls as 400-500 DEG C, the furnace gas export temperature of second stage temperature control cooling unit controls as 110-120 DEG C, collect by first step temperature control cooling unit and first step filtering unit the first dust obtaining enrichment antimony, collect by second stage temperature control cooling unit and second stage filtering unit the second dust obtaining enrichment arsenic.Furnace gas export temperature due to first step temperature control cooling unit controls as 400-500 DEG C, therefore, the antimonous oxide being collected in the first dust in first step temperature control cooling unit can reach higher degree, be convenient to the direct utilization of antimonous oxide, simultaneously because the content of antimonous oxide in the first dust is higher, then enter antimony in the second dust to reduce, therefore the content of arsenic in the second dust is relatively higher, thus is convenient to follow-uply from the second dust, extract arsenic.
In order to obtain the higher antimonous oxide of purity, can obtain again the higher white arsenic of purity, present invention also offers following lead anode slurry melting high-temperature furnace gas graded temperature-control dust cleaning technique, its step comprises:
1) the lead anode slurry melting furnace gas of temperature 600-900 DEG C that Industrial Stoves produce is introduced a furnace gas graded temperature-control dust cleaning equipment, containing the gaseous state material to be recycled that antimonous oxide and white arsenic two kinds of de-sublimation temperature are different in the described furnace gas before introducing this furnace gas graded temperature-control dust cleaning equipment;
2) guaranteeing under the temperature condition that gaseous state material to be recycled is not separated out substantially, described furnace gas is introduced the first step temperature control cooling unit in this equipment, the furnace gas export temperature of first step temperature control cooling unit controls as 400-500 DEG C, makes part material cooling to be recycled separate out formation first dust and be collected in first step temperature control cooling unit;
3) guaranteeing under the temperature condition that gaseous state material to be recycled is not separated out substantially, first step temperature control cooling unit is being discharged and carries in the furnace gas introducing first step filtering unit of the first dust and carry out udst separation and collect further obtaining the first dust;
4) guaranteeing under the temperature condition that gaseous state material to be recycled is not separated out substantially, the furnace gas of being discharged by first step filtering unit introduces second stage temperature control cooling unit, the furnace gas export temperature of second stage temperature control cooling unit controls as 300-400 DEG C, makes part material cooling to be recycled separate out formation second dust and be collected in the temperature control cooling unit of the second stage;
5) guaranteeing under the temperature condition that gaseous state material to be recycled is not separated out substantially, second stage temperature control cooling unit is being discharged and carries in the furnace gas introducing second stage filtering unit of the second dust and carry out udst separation and collect further obtaining the second dust;
6) guaranteeing under the temperature condition that gaseous state material to be recycled is not separated out substantially, the furnace gas of being discharged by second stage filtering unit introduces third stage temperature control cooling unit, the furnace gas export temperature of third stage temperature control cooling unit controls as 110-120 DEG C, makes part material cooling to be recycled separate out formation the 3rd dust and be collected in third stage temperature control cooling unit;
7) guaranteeing under the temperature condition that gaseous state material to be recycled is not separated out substantially, third stage temperature control cooling unit is being discharged and carries in the furnace gas introducing third stage filtering unit of the 3rd dust and carry out udst separation and collect further obtaining the 3rd dust;
The first dust that above-mentioned collection obtains is the dust of enrichment antimony, and the second dust is the dust of enrichment antimony, arsenic, and the 3rd dust is the dust of enrichment arsenic, and third stage filtering unit expellant gas enters subsequent recovery process or discharge.
Above-mentioned lead anode slurry melting high-temperature furnace gas graded temperature-control dust cleaning technique have employed three grades of temperature control cooling units and filtering unit, the antimonous oxide of the first dust making it obtain can reach higher degree, and the white arsenic of the 3rd dust can reach higher degree equally.
Should note, although overlapping on the point of " 400 DEG C " with between the furnace gas export temperature-controlled area of second stage temperature control cooling unit between the furnace gas export temperature-controlled area of above-mentioned first step temperature control cooling unit, but those skilled in the art obviously can take between different temperature-controlled areas in the specific implementation, thus graded temperature-control could be realized.
To part provide in the following description below in conjunction with the drawings and specific embodiments aspect that the present invention is described further, the present invention adds and advantage, part will become obvious from the following description, or be recognized by practice of the present invention.
Accompanying drawing explanation
Fig. 1 is the process flow sheet of lead anode slurry melting high-temperature furnace gas graded temperature-control dust cleaning process example 1 of the present invention.
Fig. 2 is the process flow sheet of lead anode slurry melting high-temperature furnace gas graded temperature-control dust cleaning process example 2 of the present invention.
Fig. 3 is a kind of concrete structure schematic diagram of temperature control cooling unit in present invention process.
Fig. 4 is the another kind of concrete structure schematic diagram of temperature control cooling unit in present invention process.
Embodiment
Figure 1 shows that a kind of lead anode slurry melting high-temperature furnace gas graded temperature-control dust cleaning Processes and apparatus, as shown in the drawing, this equipment comprises the first step temperature control cooling unit 211 be linked in sequence after Industrial Stoves 100, first step filtering unit 221, second stage temperature control cooling unit 212, second stage filtering unit 222 and power set 230, the furnace gas that power set 230 drives Industrial Stoves 100 to produce is successively by first step temperature control cooling unit 211, first step filtering unit 221, second stage temperature control cooling unit 212 and second stage filtering unit 222.The step of the lead anode slurry melting high-temperature furnace gas graded temperature-control dust cleaning technique of aforesaid device is adopted to comprise: the lead anode slurry melting furnace gas of temperature 600-900 DEG C that 1) is produced by Industrial Stoves 100 introduces aforesaid device, containing the gaseous state material to be recycled that antimonous oxide and white arsenic two kinds of de-sublimation temperature are different in the described furnace gas before introducing this equipment; 2) guaranteeing under the temperature condition that gaseous state material to be recycled is not separated out substantially, described furnace gas is introduced first step temperature control cooling unit 211, the furnace gas export temperature of first step temperature control cooling unit 211 controls as 400-500 DEG C, thus makes part material cooling to be recycled separate out formation first dust and be collected in first step temperature control cooling unit 211; 3) guaranteeing under the temperature condition that gaseous state material to be recycled is not separated out substantially, first step temperature control cooling unit 211 is being discharged and carries in the furnace gas introducing first step filtering unit 221 of the first dust and carry out udst separation and collect further obtaining the first dust; 4) guaranteeing under the temperature condition that gaseous state material to be recycled is not separated out substantially, the furnace gas of being discharged by first step filtering unit 221 introduces second stage temperature control cooling unit 212, the furnace gas export temperature of second stage temperature control cooling unit 212 controls as 110-120 DEG C, thus makes part material cooling to be recycled separate out formation second dust and be collected in second stage temperature control cooling unit 212; 5) guaranteeing under the temperature condition that gaseous state material to be recycled is not separated out substantially, second stage temperature control cooling unit 212 is being discharged and carries in the furnace gas introducing second stage filtering unit 222 of the second dust and carry out udst separation and collect further obtaining the second dust.After this, second stage filtering unit 222 expellant gas enters power set 230, then from the outlet of power set 230 again through smoke stack emission.
Present invention applicant has carried out commerical test to above-mentioned lead anode slurry melting high-temperature furnace gas graded temperature-control dust cleaning technique, in test, Industrial Stoves 100 specifically have employed reverberatory furnace, the fluctuation range of reverberatory furnace temperature out controls at 600-900 DEG C, after testing, the furnace gas dustiness that reverberatory furnace produces is 40-50g/m
3, wherein mainly containing the lead of the antimony of 65-75% weight, the arsenic of 3-12% weight and 1-2% weight.Between described Industrial Stoves 100 and first step temperature control cooling unit 211, between first step temperature control cooling unit 211 and first step filtering unit 221, between first step filtering unit 221 and second stage temperature control cooling unit 212, second stage temperature control cooling unit 212 is all connected by utilidor with between second stage filtering unit 222, require the temperature out of the temperature in≤utilidor of each utilidor simultaneously, each utilidor specifically adopts jacket heat-preservation mode (other modes such as electrically heated certainly also can be adopted to be incubated), high-temperature flue gas heating is adopted in chuck, thus guarantee that furnace gas is at Industrial Stoves 100, first step temperature control cooling unit 211, first step filtering unit 221, under remaining on the state of temperature that gaseous state material to be recycled is not separated out substantially when transmitting between second stage temperature control cooling unit 212 and second stage filtering unit 222, both prevented dust from separating out and blocking pipe, also the phase transformation of material to be recycled is strictly limited in each temperature control cooling unit 210 simultaneously, improve organic efficiency.Simultaneously, because first step filtering unit 221 working temperature is higher, therefore first step filtering unit 221 have employed high temperature resistant sintered iron Lu porous material filter core as filtering element, thus ensureing filtering element work-ing life, the outlet dustiness of first step filtering unit 221 controls at 20mg/m
3below; Second stage filtering unit 222 adopts cloth bag as filtering element, requires that the outlet dustiness of second stage filtering unit 222 controls equally at 20mg/m simultaneously
3below, pollute to reduce air PM2.5.In addition, first step filtering unit 221 and second stage filtering unit 222 have employed Insulation equally, namely on their shell, insulation jacket has been installed, and use high-temperature flue gas heating and thermal insulation, to make the furnace gas temperature in≤furnace gas export temperature of first step filtering unit 221 and second stage filtering unit 222, thus prevent the material in furnace gas from filtration procedure, undergoing phase transition precipitation solid particulate and block filtering element, extend the work-ing life of filtering element.In addition, power set 230 specifically adopts blower fan.
A kind of temperature control cooling unit 210 of brand-new design is additionally used, using as its first step temperature control cooling unit 211 and second stage temperature control cooling unit 212 in above-mentioned test.As Fig. 3, shown in 4, this warm cooling unit 210 comprises induction trunk 210b, receive grey cylinder 210a, described receipts grey cylinder 210a bottom is provided with ash exhauster, receive the arrangement of grey cylinder 210a top and at least two group partition water cooler 210c are installed, the pipe interior passageway of these partition water coolers 210c forms cooled air-flow road respectively, pipe is outer takes liquid cooling or/and air cooling, the inlet mouth on the cooled air-flow road of each partition water cooler 210c to be parallel on described induction trunk 210b and to be respectively equipped with valve 210d, the venting port on cooled air-flow road stretches into the grey cylinder 210a of receipts with the pipe interior passageway of the partition water cooler 210c at respective place from top to bottom respectively after maximum 1 to 2 bending, described induction trunk 210b is provided with furnace gas input aperture 210e, receive grey cylinder 210a and be provided with furnace gas delivery port 210f.As the general structure of described ash exhauster, as Fig. 3,4, it comprises and is positioned at the taper of receiving grey cylinder 210a bottom and sinks grey room, and taper is sunk the bottom of grey room and is provided with ash discharging hole, and ash discharging hole connects ash-valve 210g.The main tool of this temperature control cooling unit 210 unit has the following advantages: the first, adopt partition water cooler 210c to carry out heat exchange, heat-eliminating medium does not directly contact with between this heat-eliminating medium, can not introduce other impurity in this heat-eliminating medium; The second, the inlet mouth on the cooled air-flow road of each partition water cooler 210c to be parallel on described induction trunk 210b and to be respectively equipped with valve 210d, by controlling the unlatching quantity of these valves 210d, the heat interchanging area of adjustable temperature control cooling unit 210 unit, simply, the adjustment of temperature out is realized rapidly, and often realize sublimating in certain temperature range due to gaseous matter, control not require very accurately to temperature, therefore the design of this temperature control can meet furnace gas graded temperature-control dust cleaning processing requirement of the present invention; The dust of three, separating out not easily blocks the pipe interior passageway of partition water cooler 210c, and can realize effective sedimentation recovery in the grey cylinder 210a of receipts.In order to better regulate the temperature out of temperature control cooling unit 210, can select aperture can the valve 210d of precision adjustment, this makes it possible to open quantity and aperture by by-pass valve control 210d, improving the accuracy of temperature control.
Fig. 3 shows above-mentioned temperature control cooling unit 210 1 kinds more specifically structure.As shown in the drawing, wherein the pipeline of each partition water cooler 210c is one from turning back again after the valve 210d be connected to induction trunk 210b extends to vertex straight up and vertically dropping to the structure received in grey cylinder 210a downwards, therefore the venting port on the cooled air-flow road of each partition water cooler 210c stretches into the grey cylinder 210a of receipts from top to bottom with the pipe interior passageway of the partition water cooler 210c at respective place in fact respectively after 1 bending, like this, move from top to bottom after the furnace gas entering cooled air-flow road first moves from lower to upper and then turns back in the pipeline of partition water cooler 210c, the dust of separating out therebetween can be brought into the grey cylinder 210a of receipts by furnace gas substantially, can either effectively avoid blocking in the pipe of partition water cooler 210c, simultaneously increase heat interchanging area because the pipeline of partition water cooler 210c turns back.In the temperature control cooling unit 210 of Fig. 3, have selected air cooling mode outside the pipe of partition water cooler 210c, it specifically can according to the pipeline material of partition water cooler 210c, size etc. because usually determining heat exchange efficiency and selecting natural convection to cool with this or force quenching.In addition, in the temperature control cooling unit 210 of Fig. 3 induction trunk 210b be set directly to receive above grey cylinder 210a and and receive between grey cylinder 210a and isolated by a dividing plate, compact construction is reasonable.
Fig. 4 shows above-mentioned temperature control cooling unit 210 another kind more specifically structure.As shown in the drawing, induction trunk 210b is wherein positioned at the top certain altitude of being separated by up and down of receiving grey cylinder 210a, partition water cooler 210c is arranged on induction trunk 210b side by side and receives between grey cylinder 210a, the pipeline of partition water cooler 210c is the straight tube vertically arranged, the upper end of this pipeline connects induction trunk 210b by valve 210d, and lower end is stretched into and received grey cylinder 210a.In this structure, the pipeline of each partition water cooler 210c is the straight tube vertically arranged, and cooled gas moves from top to bottom and brought into completely by the dust of precipitation in the grey cylinder 210a of receipts in this straight tube, thus stops dust plugging problem.But, because the pipeline of partition water cooler 210c does not bend, therefore heat interchanging area is less, at this moment one is the duct length can considering to increase partition water cooler 210c, two be partition water cooler 210c pipe outside can select liquid cooling mode, such as take spray or as shown in Figure 4 at the pipeline peripheral hardware water-cooling jacket 210h of partition water cooler 210c, the two ends of water-cooling jacket 210h are respectively equipped with water-in 210i and water outlet 210j.
Lead anode slurry melting high-temperature furnace gas graded temperature-control dust cleaning technique shown in Fig. 1 can use the temperature control cooling unit 210 of Fig. 3, also can use the temperature control cooling unit 210 of Fig. 4.Test above have employed the temperature control cooling unit 210 of Fig. 3, last test-results is: the antimonous oxide being enriched with higher degree in the first dust be recovered to by first step temperature control cooling unit 211 and first step filtering unit 221, and in this dust the weight percentage of arsenic below 1%; In the second dust be recovered to by second stage temperature control cooling unit 212 and second stage filtering unit 222, the weight percentage of antimony is then below 20%, and the arsenic in furnace gas is all enriched in the second dust substantially.
Be then another kind of lead anode slurry melting high-temperature furnace gas graded temperature-control dust cleaning technique shown in Fig. 2, its equipment comprises the first step temperature control cooling unit 211 be linked in sequence after Industrial Stoves 100, first step filtering unit 221, second stage temperature control cooling unit 212, second stage filtering unit 222, third stage temperature control cooling unit 213, third stage filtering unit 223 and power set 230, the furnace gas that power set 230 drives Industrial Stoves 100 to produce is successively by first step temperature control cooling unit 211, first step filtering unit 221, second stage temperature control cooling unit 212, second stage filtering unit 222, third stage temperature control cooling unit 213 and third stage filtering unit 223.The step of this technique comprises: the lead anode slurry melting furnace gas of temperature 600-900 DEG C that 1) is produced by Industrial Stoves 100 introduces a furnace gas graded temperature-control dust cleaning equipment 200, containing the gaseous state material to be recycled that antimonous oxide and white arsenic two kinds of de-sublimation temperature are different in the described furnace gas before introducing this furnace gas graded temperature-control dust cleaning equipment 200; 2) guaranteeing under the temperature condition that gaseous state material to be recycled is not separated out substantially, described furnace gas is introduced the first step temperature control cooling unit 211 in this equipment, the furnace gas export temperature of first step temperature control cooling unit 211 controls as 400-500 DEG C, makes part material cooling to be recycled separate out formation first dust and be collected in first step temperature control cooling unit 211; 3) guaranteeing under the temperature condition that gaseous state material to be recycled is not separated out substantially, first step temperature control cooling unit 211 is being discharged and carries in the furnace gas introducing first step filtering unit 221 of the first dust and carry out udst separation and collect further obtaining the first dust; 4) guaranteeing under the temperature condition that gaseous state material to be recycled is not separated out substantially, the furnace gas of being discharged by first step filtering unit 221 introduces second stage temperature control cooling unit 212, the furnace gas export temperature of second stage temperature control cooling unit 212 controls as 300-380 DEG C, makes part material cooling to be recycled separate out formation second dust and be collected in second stage temperature control cooling unit 212; 5) guaranteeing under the temperature condition that gaseous state material to be recycled is not separated out substantially, second stage temperature control cooling unit 212 is being discharged and carries in the furnace gas introducing second stage filtering unit 222 of the second dust and carry out udst separation and collect further obtaining the second dust; 6) guaranteeing under the temperature condition that gaseous state material to be recycled is not separated out substantially, the furnace gas of being discharged by second stage filtering unit 222 introduces third stage temperature control cooling unit 213, the furnace gas export temperature of third stage temperature control cooling unit 213 controls as 110-120 DEG C, makes part material cooling to be recycled separate out formation the 3rd dust and be collected in third stage temperature control cooling unit 213; 7) guaranteeing under the temperature condition that gaseous state material to be recycled is not separated out substantially, third stage temperature control cooling unit 213 is being discharged and carries in the furnace gas introducing third stage filtering unit 223 of the 3rd dust and carry out udst separation and collect further obtaining the 3rd dust.After this, third stage filtering unit 223 expellant gas enters power set 230, then from the outlet of power set 230 again through smoke stack emission.
Above-mentioned the second lead anode slurry melting high-temperature furnace gas graded temperature-control dust cleaning technique has carried out commerical test equally, wherein Industrial Stoves 100 still adopt reverberatory furnace, the fluctuation range of reverberatory furnace temperature out controls at 600-900 DEG C, after testing, the furnace gas dustiness that reverberatory furnace produces is 40-50g/m
3, wherein mainly containing the lead of the antimony of 65-75% weight, the arsenic of 3-12% weight and 1-2% weight.Between described Industrial Stoves 100 and first step temperature control cooling unit 211, between first step temperature control cooling unit 211 and first step filtering unit 221, between first step filtering unit 221 and second stage temperature control cooling unit 212, between second stage temperature control cooling unit 212 and second stage filtering unit 222, between second stage filtering unit 222 and between third stage temperature control cooling unit 213, third stage temperature control cooling unit 213 is all connected by utilidor with between third stage filtering unit 223, require the temperature out of the temperature in≤utilidor of each utilidor simultaneously, each utilidor specifically adopts jacket heat-preservation mode, high-temperature flue gas heating is adopted in chuck.Meanwhile, first step filtering unit 221, second stage filtering unit 222 all have employed high temperature resistant sintered ceramic porous material filter core as filtering element, and outlet dustiness controls at 20mg/m
3below; Third stage filtering unit 223 still adopts cloth bag as filtering element, and the outlet dustiness of third stage filtering unit 223 controls equally at 20mg/m
3below.In addition, first step filtering unit 221, second stage filtering unit 222 and third stage filtering unit 223 have employed identical Insulation equally, to make the furnace gas temperature in≤furnace gas export temperature of first step filtering unit 221 and second stage filtering unit 222.Above-mentioned first step temperature control cooling unit 211, second stage temperature control cooling unit 212 and third stage temperature control cooling unit 213 adopt the temperature control cooling unit 210 of Fig. 4.Power set 230 is still blower fan.
The test-results of the second lead anode slurry melting high-temperature furnace gas graded temperature-control dust cleaning technique is: the first dust be recovered to by first step temperature control cooling unit 211 and first step filtering unit 221 is enriched with the antimonous oxide of higher degree, and in this dust, the weight percentage of arsenic is below 1%; Both also contain white arsenic containing antimonous oxide in the second dust be recovered to by second stage temperature control cooling unit 212 and second stage filtering unit 222, the weight percentage of arsenic is below 10%; The 3rd dust be recovered to by third stage temperature control cooling unit 213 and third stage filtering unit 223 is enriched with the white arsenic of higher degree, and in this dust, the weight percentage of antimony is below 1%.
In conjunction with the vapour pressure of white arsenic and the vapour pressure of the corresponding relation (as table 1) of temperature and antimonous oxide and the corresponding relation (as table 2) of temperature, for the first lead anode slurry melting high-temperature furnace gas graded temperature-control dust cleaning technique above, the cooling of first step temperature control is at 400-500 DEG C, when being based on about 450 DEG C, white arsenic saturated vapor pressure is more than 70,000 times of antimonous oxide, now antimonous oxide more than 98% has all been separated out, and white arsenic can not be separated out, achieve arsenic antimony and be separated.Second stage temperature control cooling is reduced to about 110-120 DEG C, and now white arsenic more than 99.99% is separated out, and therefore achieves the enriching and recovering of arsenic.And for the second lead anode slurry melting high-temperature furnace gas graded temperature-control dust cleaning technique above, centre adds the cooling of one-level temperature control at 300-400 DEG C, the antimony that the first step does not cool down completely above cools precipitation further, obtain the mixture of arsenic antimony, after the third stage cooling just can collect purer white arsenic.
Table 1: the relation of white arsenic vapour pressure and temperature
| Temperature (DEG C) | 110 | 150 | 200 | 250 | 300 | 350 | 400 | 450 | 476 |
| Vapour pressure (KPa) | 0.000118 | 0.00322 | 0.09125 | 1.3646 | 12.7292 | 18.5955 | 39.2545 | 74.7310 | 100.96 |
Table 2: the relation of antimonous oxide vapour pressure and temperature
| Temperature (DEG C) | 300 | 350 | 400 | 450 | 500 | 600 | 700 | 839 |
| Vapour pressure (Pa) | 0.000177 | 0.005007 | 0.08593 | 0.9953 | 8.3975 | 287.309 | 4756.001 | 101720 |
Claims (10)
1. furnace gas graded temperature-control dust cleaning technique, its step comprises:
1) furnace gas that Industrial Stoves (100) produce is introduced furnace gas graded temperature-control dust cleaning equipment (200), introduce gaseous state materials to be recycled different containing at least two kinds of de-sublimation temperature in the front described furnace gas of this furnace gas graded temperature-control dust cleaning equipment (200);
2) guaranteeing under the temperature condition that gaseous state material to be recycled is not separated out substantially, described furnace gas is introduced the first step temperature control cooling unit (211) in this equipment, make part material cooling to be recycled separate out formation first dust and be collected in first step temperature control cooling unit (211);
3) guaranteeing under the temperature condition that gaseous state material to be recycled is not separated out substantially, first step temperature control cooling unit (211) is being discharged and carries in furnace gas introducing first step filtering unit (221) of the first dust and carry out udst separation and collect further obtaining the first dust;
4) guaranteeing under the temperature condition that gaseous state material to be recycled is not separated out substantially, the furnace gas of being discharged by first step filtering unit (221) introduces second stage temperature control cooling unit (212), makes part material cooling to be recycled separate out formation second dust and be collected in second stage temperature control cooling unit (212);
5) guaranteeing under the temperature condition that gaseous state material to be recycled is not separated out substantially, second stage temperature control cooling unit (212) is being discharged and carries in furnace gas introducing second stage filtering unit (222) of the second dust and carry out udst separation and collect further obtaining the second dust;
The first dust that above-mentioned collection obtains is the dust being enriched with described a kind of material to be recycled, and the second dust is the dust being enriched with described a kind of material to be recycled, and second stage filtering unit (222) expellant gas enters subsequent recovery process or discharge.
2. furnace gas graded temperature-control dust cleaning technique as claimed in claim 1, it is characterized in that: the furnace gas that described Industrial Stoves (100) produce is the lead anode slurry melting furnace gas of temperature 600-900 DEG C, and the material to be recycled of gaseous state is wherein respectively antimonous oxide and white arsenic, furnace gas graded temperature-control dust cleaning equipment (200) is only provided with the two-stage temperature control cooling unit (210) comprising first step temperature control cooling unit (211) and second stage temperature control cooling unit (212), the furnace gas export temperature of first step temperature control cooling unit (211) controls as 400-500 DEG C, the furnace gas export temperature of second stage temperature control cooling unit (212) controls as 110-120 DEG C, the first dust obtaining enrichment antimony is collected by first step temperature control cooling unit (211) and first step filtering unit (221), the second dust obtaining enrichment arsenic is collected by second stage temperature control cooling unit (212) and second stage filtering unit (222).
3. furnace gas graded temperature-control dust cleaning technique as claimed in claim 2, is characterized in that: in described first step filtering unit (221) and second stage filtering unit (222), at least first step filtering unit (221) adopts high temperature resistant sintering diamond bit filter core or high temperature resistant sintered ceramic porous material filter core as filtering element.
4. furnace gas graded temperature-control dust cleaning technique as claimed in claim 1, it is characterized in that: between described Industrial Stoves (100) with first step temperature control cooling unit (211) or/and described first step temperature control cooling unit (211) with between first step filtering unit (221) or/and or/and described second stage temperature control cooling unit (212) is connected by utilidor with between second stage filtering unit (222) between described first step filtering unit (221) with second stage temperature control cooling unit (212), the temperature out of the temperature in≤utilidor of utilidor.
5. furnace gas graded temperature-control dust cleaning technique as claimed in claim 1, is characterized in that: described first step filtering unit (221) is or/and the furnace gas temperature in≤furnace gas export temperature of second stage filtering unit (222).
6., for the furnace gas graded temperature-control dust cleaning equipment of technique described in claim 1, it is characterized in that, comprising:
First step temperature control cooling unit (211), the furnace gas of the gaseous state to be recycled material different containing at least two kinds of de-sublimation temperature that described first step temperature control cooling unit (211) receives that Industrial Stoves (100) produce, and will wherein part material cooling to be recycled separate out formation first dust and be collected in first step temperature control cooling unit (211);
First step filtering unit (221), described first step filtering unit (221) receives the furnace gas carrying the first dust that first step temperature control cooling unit (211) is discharged, and collects further by carrying out udst separation to this furnace gas and obtain the first described dust;
Second stage temperature control cooling unit (212), described second stage temperature control cooling unit (212) receives the furnace gas that first step filtering unit (221) is discharged, and will wherein part material cooling to be recycled separate out formation second dust and be collected in second stage temperature control cooling unit (212);
Second stage filtering unit (222), described second stage filtering unit (222) receives second stage temperature control cooling unit (212) furnace gas carrying the second dust that discharges, and collects further by carrying out udst separation to this furnace gas and obtain the second described dust; And
Power set (230), the furnace gas that described power set (230) drives Industrial Stoves (100) to produce is successively by first step temperature control cooling unit (211), first step filtering unit (221), second stage temperature control cooling unit (212) and second stage filtering unit (222);
Wherein, furnace gas Industrial Stoves (100), first step temperature control cooling unit (211), first step filtering unit (221), transmit between second stage temperature control cooling unit (212) and second stage filtering unit (222) time remain on the state of temperature that gaseous state material to be recycled is not separated out substantially under; First dust is the dust being enriched with described a kind of material to be recycled, and the second dust is the dust being enriched with described a kind of material to be recycled.
7. furnace gas graded temperature-control dust cleaning equipment as claimed in claim 6, it is characterized in that: described first step temperature control cooling unit (211) is or/and second stage temperature control cooling unit (212) comprises induction trunk (210b), receive grey cylinder (210a), the grey cylinder of described receipts (210a) bottom is provided with ash exhauster, receive the arrangement of grey cylinder (210a) top and at least two group partition water coolers (210c) are installed, the pipe interior passageway of these partition water coolers (210c) forms cooled air-flow road respectively, pipe is outer takes liquid cooling or/and air cooling, the inlet mouth on the cooled air-flow road of each partition water cooler (210c) is parallel to described induction trunk (210b) and goes up and be respectively equipped with valve (210d), the venting port on cooled air-flow road stretches into the grey cylinder of receipts (210a) from top to bottom with the pipe interior passageway of the partition water cooler (210c) at respective place respectively, described induction trunk (210b) is provided with furnace gas input aperture (210e), receive grey cylinder (210a) and be provided with furnace gas delivery port (210f).
8. furnace gas graded temperature-control dust cleaning equipment as claimed in claim 7, is characterized in that: the pipeline of partition water cooler (210c) be one from turning back downwards again after the valve (210d) be connected to induction trunk (210b) extends to vertex straight up and vertically dropping to the structure received in grey cylinder (210a).
9. furnace gas graded temperature-control dust cleaning equipment as claimed in claim 7, it is characterized in that: described induction trunk (210b) is positioned at the top certain altitude of being separated by up and down of receiving grey cylinder (210a), partition water cooler (210c) is arranged on induction trunk (210b) side by side and receives between grey cylinder (210a), the pipeline of partition water cooler (210c) is the straight tube vertically arranged, the upper end of this pipeline connects induction trunk (210b) by valve (210d), and lower end is stretched into and received grey cylinder (210a).
10. from furnace gas cooling separate out and reclaim have valency dust, it is characterized in that: this dust is the first dust of enrichment antimony of being obtained by furnace gas graded temperature-control dust cleaning technique according to claim 2 or the second dust of enrichment arsenic.
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