CN103540753A - Refining purifying recycling processing method of heavy metal from collected dust or sludge obtained from processing of heavy metal polluted soil or waste - Google Patents

Refining purifying recycling processing method of heavy metal from collected dust or sludge obtained from processing of heavy metal polluted soil or waste Download PDF

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Publication number
CN103540753A
CN103540753A CN201310480943.4A CN201310480943A CN103540753A CN 103540753 A CN103540753 A CN 103540753A CN 201310480943 A CN201310480943 A CN 201310480943A CN 103540753 A CN103540753 A CN 103540753A
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heavy metal
heavy
again
metal
heating
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CN201310480943.4A
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Chinese (zh)
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胡耀忠
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旻鑫系统股份有限公司
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Priority to CN201310480943.4A priority Critical patent/CN103540753A/en
Publication of CN103540753A publication Critical patent/CN103540753A/en

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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies
    • Y02W30/54Metal recycling

Abstract

The invention relates to a refining purifying recycling processing method of heavy metal from coarse mercury type high concentration collected dust or sludge, which are obtained from processing of heavy metal polluted soil or waste. The heavy metal polluted soil or waste is subjected to heat processing or wetcleaning processing, and then the collected dust or sludge containing relatively high concentration heavy metal is obtained. The refining purifying recycling processing method comprises following steps: a1, physical purification of the collected dust containing heavy metal; a2, drying; a3, mixing of ore sand and conductive powder sand, and adding of a reducing agent; a4, gasification of heavy metal via high frequency induction heating; a5, condensation and recycling, wherein gasified heavy metal is condensed to be liquid or solid for recycling; and a6, processing of exhaust gas. The refining purifying recycling processing method is capable of refining, purifying, and recycling heavy metal precipitated from the heavy metal collected dust; operation efficiency is higher, and processing cost is reduced.

Description

Rear control of dust thing or sludge heavy-metal Refining recovery and treatment method are processed in heavy-metal contaminated soil or waste regulation

Technical field

The present invention about a kind of heavy-metal contaminated soil or waste regulation process after control of dust thing or sludge heavy-metal Refining recovery and treatment method, be a kind of method that can efficient Refining heavy metal.

Background technology

In the modern environment of industry and commerce high speed development, often cause various pollution to produce, and soil is the final bearing object of each pollutent, often because discharge of wastewater, waste are buried, the various factor such as the improper seepage of industrial operation causes soil to contain the toxic substances such as the heavy metals such as mercury, lead, cadmium and dioxin, thereby regulation is actively improved to safeguard Land Environment and safety for contaminated soil mostly in countries in the world.

For land forming, there is multiple regulation mode, when wherein heat treatment mode can be heated to 1200 ℃ of above high temperature to contaminated soil, more can will destroy as dioxin or other toxic chemical substance thermal degradation, and can be by lesser temps decomposition evaporation heavy metal substance as mercury while heating, plumbous, cadmiums etc. are departed from is attached to the object that soil media reaches regulation purification, and make heavy metal vapor enter in empty dirty control equipment and be collected and obtain control of dust thing with air-flow by the smoke-uptake of being processed stove by heating regulation, the method that washes is processed and via chemical reaction mode, to be obtained heavy metal compound and give the mud after separation via proportion physical properties mode, yet control of dust thing and mud all contain greater concn heavy metal compound component proportions, causing this mixture directly not reclaim must deal carefully with safely again, again because its content ratio is difficult to stable control, be difficult to reach the economic ore in sand form level content composition that refines benefit, if only this treating processes with known traditional way as electrolytic process, it is not good that vacuum distillation method traditional way has efficiency, the higher disappearance of consuming time and cost.

Summary of the invention

Object of the present invention is control of dust thing or sludge heavy-metal Refining recovery and treatment method after providing the regulation of a kind of heavy-metal contaminated soil or waste to process, be can efficient refining contaminated soil or castoff heat process after the method processed of the heavy metal that includes of control of dust thing or mud.

For reaching above-mentioned purpose, solution of the present invention is:

Rear control of dust thing or sludge heavy-metal Refining recovery and treatment method are processed in a kind of heavy-metal contaminated soil or waste regulation, heavy metal soil or waste are formed containing heavy metal control of dust thing or mud via processing, and this heavy metal control of dust thing or mud refining treatment method comprise the following steps:

A1, containing heavy metal control of dust thing physical purification program, produces the ore in sand form of high density heavy metal compound composition;

A2 drying program; By the ore in sand form moisture removal of a1 program;

A3 ore in sand form hybrid conductive flour sand and reductive agent program;

A4 high frequency electric current induction heating ream weight metal gasification program, makes the heavy metal gasification of ore in sand form by high frequency Electromagnetic Heating to ore in sand form;

A5 condensation reclaimer, is condensed into liquid or solid-state recovery by gasification heavy metal.

Described a1 carries out physical property washup operation containing heavy metal control of dust thing physical purification program by the dust thing that contains after treatment heavy metal compound, and obtain the heavy metal compound composition ore in sand form of greater concn, described a3 ore in sand form hybrid conductive flour sand and reductive agent program add suitable conductive carbon dust and iron sand to be mixed according to ore in sand form ratio again, and heavy metal compound adds calcium oxide as reductive agent depending on concentration ratio while containing sulfide composition.

Described a4 high frequency induction heating ream weight metal gasification program imports high frequency induction region by this ore in sand form containing conductive carbon dust and iron sand powder makes carbon and iron sand produce eddy current effects heating, and makes in ore in sand form the gasification of being heated of heavy metal compound component substances.

Described high frequency induction heating adopts high frequency heating unit, and this high frequency heating unit has a feed chamber, a heating chamber ,Yi unloading house, a supply unit, a ruhmkorff coil group, and this feed chamber has lid, and can closely sealed feed chamber; This heating chamber has entrance and is connected with feed chamber again, and has outlet and be connected with unloading house, and this heating chamber outer wall is isolator again; Supply unit has motor again, and this motor interlock feed worm, again this feed worm group in heating chamber, and entrance and the outlet position of the corresponding heating chamber in two ends, and this feed worm is conductive metal material manufacture; This ruhmkorff coil is mounted on heating chamber outside again, and high frequency electromagnetic field in can producing during by middle high frequency electric current, and makes feed worm produce eddy current heating as boosting source; You Gai unloading house is connected with heating chamber outlet, and discharge gate, bleeding point are set.

During described a5 condensation reclaimer exhaust, carry out again a51 exhaust detecting and cycle heat treatment program.

Aforementioned heating chamber sets into device of air, and this enters device of air and conduit is set connects outside air feed equipment and connection condensation reclaimer and reflux and process gas again, and Set scale formula air valve, under meter are to control air input, described bleeding point is connected with extraction pipe, vacuum fan again, and in this extraction pipe, strainer is set, and extraction pipe strainer outer rim arranges high frequency electromagnetic induction coil group.

Described a5 condensation reclaimer imports condensing equipment by heavy metal vapor and is condensed into liquid or solid-state to reclaim high purity heavy metal, and this condensing equipment has condensing chamber, and this condensing chamber has entrance and connects aforementioned extraction pipe, and there is export mouth, venting port, refrigeration equipment is set again, heavy metal vapor being imported in condensing chamber can rapid coagulation become liquid or solid-state derives high purity heavy metal by export mouth again and reclaims, this venting port can be discharged the gas of desorption heavy metal again, conduit and extraction pipe that the venting port of this condensing equipment and aforementioned high frequency heating unit enter device of air are connected to form circulation loop, and gas sensing instrument is set, proportion expression air valve is to process venting port Exhaust Gas importing heating chamber or condensing chamber again depending on demand.

After aforementioned a5 condensation reclaimer, can carry out again a6 vent gas treatment program, and this vent gas treatment program can absorb by the atomic free heavy metal gas of condensation reclaimer discharge, to avoid this free heavy metal gas directly to discharge atmosphere.

After aforementioned a5 condensation reclaimer, can carry out again a6 vent gas treatment program, and this vent gas treatment program can absorb by the atomic free heavy metal gas of condensation reclaimer discharge, to avoid this free heavy metal gas directly to discharge atmosphere.

Described a6 vent gas treatment program has absorption chamber, and this absorption chamber has entrance and connects aforementioned venting port, and there is outlet, can or the free heavy metal of activated carbon adsorption be set by sulfuration absorption again, and the heating chamber that can import again aforementioned high frequency heating unit after this activated carbon use is processed, this absorption chamber outlet is connected with heating tail end chamber again, and this heating tail end chamber has entrance to import aforementioned absorption chamber Exhaust Gas, and gas inlet is set, heating unit and tail gas outlet are set again, the air mixed that can import oxygen rich air with outside while making to import heating tail end chamber by absorption chamber outlet Exhaust Gas is again via being discharged by tail gas outlet after reacting by heating again.

The present invention really refining reclaims heavy metal, and make to reclaim purity and can promote, and refining efficiency of the present invention is high, working temperature is low, can reduce energy loss and processing cost, the present invention coordinates suitable pre-process program can be widely used in heavy metal recovery environmental technology field again.

Accompanying drawing explanation

Fig. 1 is refining treatment method flow diagram of the present invention;

Fig. 2 is high frequency heating unit of the present invention and absorption chamber, heating tail end chamber schematic diagram;

Fig. 3 is high frequency heating unit of the present invention and absorption chamber, heating tail end chamber action schematic diagram.

[primary clustering nomenclature]

A1 is containing heavy metal control of dust thing physical purification program

A2 drying program

A3 ore in sand form hybrid conductive flour sand and reductive agent program

A4 high frequency electric current induction heating ream weight metal gasification program

A5 condensation reclaimer

A51 exhaust detecting and cycle heat treatment program

A6 vent gas treatment program

1 feed chamber 11 lid 2 heating chambers

21 entrance 22 outlets 23 enter device of air

The outside air feed equipment 233 proportion expression air valves of 231 conduit 232

234 flow portion 3 unloading house's 31 discharge gates

311 outfeed belt conveyor 32 bleeding point 321 extraction pipes

322 vacuum fan 323 strainer 324 ruhmkorff coil groups

33 magnetic separator 4 supply unit 41 motors

42 feed worm 5 ruhmkorff coil group 6 condensing chambers

61 entrance 62 export mouth 63 venting ports

64 refrigeration equipment 65 gas sensing instrument 66 proportion expression air valves

7 absorption chamber 711 proportion expression air valve 71 entrances

72 outlet 8 heating tail end chamber 81 entrances

82 gas inlet 821 pumping 83 tail gas outlets

9 ore in sand form 91 conduction flour sand 92 pure land 93 iron sand.

Embodiment

In order further to explain technical scheme of the present invention, below by specific embodiment, the present invention will be described in detail.

Heavy metal soil or waste that the present invention processes can be burnt by heating furnace high-temperature via heat treatment mode, again in this contaminated soil or waste heavy metal (as mercury, plumbous, cadmium, zinc, copper etc.) can depart to adhere to and disengage because heat generation physical property decomposition gas changes into metal vapors, and follow dust in stove to derive and collect with air-flow, and this derivation enters and in the empty dirty facility for prevention and control of control of dust, collects the heavy metal composition control of dust material obtaining more higher than former thermal treatment regulation soil concentration containing heavily belonging to control of dust thing, and this control of dust thing also can be other pollutions of processing engineering method generation or other are containing heavy metal control of dust thing, and as shown in the first figure, the present invention is directed to this heavy metal control of dust thing or mud refining treatment method comprises the following steps: a1 is containing heavy metal control of dust thing physical purification program, a2 drying program, a3 ore in sand form hybrid conductive flour sand and reductive agent program, a4 high frequency electric current induction heating ream weight metal gasification program, a5 condensation reclaimer, a51 exhaust detecting and cycle heat treatment program, a6 vent gas treatment program.

Wherein said a1 carries out physical property washup operation containing heavy metal control of dust thing physical purification program by the dust thing of the heavy metal compounds such as mercurous, plumbous, cadmium after heat treatment, and this washup operation can sharp swirling water current separation, the mode operation such as center of gravity centrifugation, proportion solution separating, to obtain the heavy metal than former control of dust thing or mud with greater concn heavy metal compound composition; Described a2 drying program will utilize low-temperature vacuum drying mode by its moisture removal after washup operation again; Described a3 ore in sand form hybrid conductive flour sand and reductive agent program are arranged ratio of mixture calculating according to ore in sand form with volumetric ratio square formation again, suitably sneaking into carbon and the iron sand can with electroconductibility is mixed, be intended to expand contact surface area, the heavy metal compound in ore in sand form also adds calcium oxide as reductive agent depending on amount concentration ratio as contained sulfide composition.

A4 high frequency induction heating ream weight metal of the present invention gasification program imports this its electromagnetic field of high frequency electric current electromagnetic induction region and makes it have having the carbon of conduction and iron sand generation eddy current effects to generate heat rapidly containing having the carbon of electroconductibility and the mixing ore in sand form of iron sand, and makes heavy metal compound component substances decomposes gasification in ore in sand form.

See also Fig. 1 to Fig. 3, described in this, high frequency induction heating adopts high frequency heating unit, and this high frequency heating unit has a feed chamber 1, heating chamber 2 ,Yi unloading house 3, a supply unit 4, a ruhmkorff coil group 5, and this feed chamber 1 has lid 11, and can closely sealed feed chamber 1, this heating chamber 2 has entrance 21 and is connected with feed chamber 1 again, and there is outlet 22Yu unloading house 3 and connect, these heating chamber 2 outer walls are isolator again, and this outer wall can be pottery or quartz ware, set into again device of air 23 and to look demand inside and outside, import the chemical reduction reaction gas of demand, as air, oxygen, gas is processed in carbon monoxide or aftermentioned circulation again, and this enters, and device of air 23 arranges the conduit 231 outside air feed equipments 232 of connection and gas is processed in the backflow of connection condensation reclaimer again, and Set scale formula air valve 233, under meter 234 is to control air input, this supply unit 4 has motor 41 again, and this motor 41 is located at feed chamber 1 outside, and interlock feed worm 42, this feed worm 42 is located in heating chamber 2 again, and the entrance 21 of the corresponding heating chamber 2 in two ends and export 22 positions, and this feed worm 42 is that conductive metal material manufacture is as stainless steel etc., this ruhmkorff coil group 5 is located at heating chamber outside 2 again, and can produce cycle electromagnetic field during by middle high frequency electric current, and makes feed worm 42 also can produce eddy current heating as subsidy heating source, You Gai unloading house 3 is connected with heating chamber 2 outlets 22, and discharge gate 31, bleeding point 32 are set, and this discharge gate 31 is connected with outfeed belt conveyor 31.

Refer to Fig. 3, the present invention makes the heavy metal ore in sand form 9 of this hybrid conductive flour sand can import in feed chamber 1, closely sealed lid 11 is with closely sealed feed chamber 1 again, and this ore in sand form 9 can be batch quantity and imports after each processing operation, make again feed worm 42 actions by the processing of generating heat in the 9 continuous and quantitatives importing high frequency electromagnetic field inducing compartments of the ore in sand form in feed chamber 1, and make ruhmkorff coil group 5 shake electric current by high frequency making feed worm 42 can respond to high frequency current field heating and ore in sand form 9 is heated as supplementary, this conductive carbon powder and iron sand powder can be responded to high frequency current field generation whirlpool electrical effect simultaneously to ore in sand form 9 heating again, and be admixture because of carbon dust and iron sand and containing heavy metal ore in sand form 9, when carbon dust and iron sand adstante febre are much better than known electric heating or other type of heating to the heating specific surface area containing heavy metal ore in sand form, can significantly promote and accelerate heavy metal compound matter decomposes gasification heating efficiency, again iron sand fusing point be 1450 ℃ far above mercury, plumbous, the heavy metal compound decomposition temperatures such as cadmium, thereby can be smoothly by mercury, plumbous, the heavy metals such as cadmium are reached gasified metal steam, in this heat-processed, carbon dust and iron sand also have the function of reductive agent except having heating function again, when heating chamber 2 have appropriate chemical reaction gas or in addition when entering device of air 23 injecting gas carbon dust heating form carbon monoxide and be distributed in heating chamber 2, bring up heating chamber 2 and be full of reducing gas atmosphere environment, can accelerate heavy metal separates out, and take red precipitate as its chemical equation of example HgO+CO-> Hg+CO 2reducible mercury also produces nontoxic carbonic acid gas, as contain sulfide composition with prior mixed oxidization calcium as reductive agent, take zunsober as its chemical equation of example 4HgS+4CaO-> 4Hg+3CaS+CaSO 4, this iron sand activity is strong compared with heavy metals such as mercury, lead again, also can have assistant reducing agent function, this enters device of air 23 and also can limit demand directly to import carbon monoxide etc. to have the reducing gas of having chemical reaction function gas to heating chamber 2 again, and aforementioned manner can not must arrange carbon dust in heating chamber and can have reduction and accelerate heavy metal and separate out effect.

This mercury again, plumbous, when the heavy metal decomposes reduction such as cadmium are separated out, this heavy metal in liquid phase stagnation point also becomes to have conductive material, and can being subject to middle high frequency electromagnetic field inducing to produce the autologous heating of eddy current effects, to cause Quick-gasifying be mercury, plumbous, the metal vapors states such as cadmium are discharged by bleeding point 32, thereby aforementioned heat-processed coordinates feed worm 42, conduction flour sand produces whirlpool electrical effect and the autologous heating operation of heavy metal, its processing temperature can and be guaranteed lower than known refining type of heating under samming environment, the heavy metal that is reduced to metallic state is being gasified totally completely, middle high frequency electromagnetic field inducing coil current can be controlled the magnitude of current of output by ruhmkorff coil via microcomputer controller and reaches and carry out stable constant temperature operation again, therefore to containing the ore in sand form of various heavy composition, with the classification purification refining of various temperature resolution rank, and can significantly promote refining efficiency and reduce costs.

Aforementioned discharge gate 31 can be discharged the dust soil after processing by outfeed belt conveyor 311, and this discharge dust soil can be again via magnetic separator 33 by iron sand 93 compositions in magnetic means draw dust soil, and sorting produces iron sand 93 and the pure land 92, aforementioned bleeding point 32 is connected with extraction pipe 321 again, vacuum fan 322, and in this extraction pipe 321, the non-conductor Materials Filter 323 that insulate can be set, as ceramic hole sizer, glass fibre screen cloth etc., and extraction pipe 321 insulation Materials Filter 323 outer rims arrange high frequency electromagnetic induction coil group 324, and can guarantee that interior the mixing while containing micro-fine dust of heavy metal vapor that enters extraction pipe 321 can be intercepted by strainer 323, guaranteeing only can derive gas, and this high frequency electromagnetic induction coil group 324 can import high frequency electric current and produce high frequency electromagnetic field, preventing that part micro heavy steam from condensing in strainer 323 stage casings being responded to heating and is guaranteed that this heavy metal passes through strainer for being gasified totally with metal vapors state derivation.

A5 condensation reclaimer of the present invention imports condensing equipment by heavy metal vapor and is condensed into solid-state or liquid to reclaim high purity heavy metal, aforementioned to containing the ore in sand form of various heavy composition, with the classification purification refining of various temperature resolution rank, in this program, can obtain and reach more than 99.9% recovery high purity heavy metal, and this condensing equipment has condensing chamber 6, and this condensing chamber 6 has the aforementioned extraction pipe 321 of entrance 61 connection, and there is export mouth 62, venting port 63, refrigeration equipment 64 is set again, heavy metal vapor is imported in condensing chamber 6 and can rapid coagulation become solid-state or liquid again by export mouth 62 derivation high purity mercury, plumbous, the heavy metals such as cadmium reclaim, and this venting port 63 can be discharged as carbonic acid gas or other are as gases such as sulfurous gas.

Can carry out again a51 exhaust detecting and cycle heat treatment program during this a5 condensation reclaimer exhaust again, and venting port 63 pipelines of this condensing equipment and the conduit that enters device of air 23 231 and the extraction pipe 321 of aforementioned high frequency heating unit are connected to form circulation loop, and gas sensing instrument 65 is set, proportion expression air valve 66 with depending on demand by venting port 63 Exhaust Gas import heating chambers 2 or condensing chamber 6 more capable chemistry should process, this gas sensing instrument 65 can be detected uncooled micro heavy (for example mercury) or have neither part nor lot in carbon monoxide or the sulfide gas content of reduction reaction again, and in content during higher than set(ting)value this Exhaust Gas can not derive, and circulation imports in front end condensing chamber 6, and this gas can be heated containing heavy metal composition again and minute parses, while having carbon monoxide in this gas again, can in repeatedly circulating, control importing heating chamber 2 formation reductive agents separates out more to accelerate heavy metal, and this gas sensing sulfide also can be noted in heating chamber when higher and add calcium oxide sustained reaction and absorb and form calcium sulfate compound, so can coordinate gas sensing instrument 65 detecting datas to make Exhaust Gas importing heating chamber 2 or condensing chamber 6 recirculation repeatedly process, and when meeting emission standard, detecting discharges again, so can more reduce vent gas treatment load and process energy loss, and can meet the strictest emission standard.

The present invention can carry out a6 vent gas treatment program after aforementioned a5 condensation reclaimer again, and this vent gas treatment program can prevent absorption to discharge and have atomic free heavy metal gas to avoid this free heavy metal gas directly to discharge atmosphere in condensation reclaimer, and absorption chamber 7 can be set, and this absorption chamber 7 has entrance 71 and Set scale formula air valve 711 connects aforementioned venting port 63, and have outlet 72, can utilize again sulfuration to absorb or the free denier heavy metal of activated carbon (not indicating in figure) absorption is set, and the heating chamber 2 that can import again aforementioned high frequency heating unit after this activated carbon use substitutes powdered carbon as reductive agent use processing, these absorption chamber 7 outlets 72 are connected with heating tail end chamber 8 again, and this heating tail end chamber 8 has entrance 81 and can import aforementioned absorption chamber 7 Exhaust Gas, and gas inlet 82 is set and imports extraneous air by pumping 821, heating unit (not indicating in figure) and tail gas outlet 83 are set again, and this heating unit can be electric heating body or burner, a small amount of carbon monoxide that the air mixed that can import oxygen rich air with outside while making to import heating tail end chamber 8 by absorption chamber 7 outlet 72 Exhaust Gas makes to have neither part nor lot in reduction reaction via heating more again combustion oxidation forms carbonic acid gas again by tail gas outlet 83 discharges, the a small amount of oxysulfide gas of part again, by as imported, liming washs or other modes absorb with lime powder, can guarantee that Exhaust Gas of the present invention reaches completely is more better than the empty dirty emission standard of environmental protection.

With by the above, the present invention really refining reclaims heavy metal, and make to reclaim purity and can promote, and refining efficiency of the present invention is high, working temperature is low, can reduce energy loss and processing cost, the present invention coordinates suitable pre-process program can be widely used in heavy metal recovery environmental technology field again, such as containing Clark cell destruction etc., in addition the present invention also can not implement vent gas treatment program when Exhaust Gas meets empty dirty standard after high frequency induction heating device is processed, and previous embodiment is illustration of the present invention, not the present invention's restriction, all equivalence changes of doing according to spirit of the present invention also should belong in category of the present invention.

Claims (10)

  1. A heavy-metal contaminated soil or waste regulation process after control of dust thing or sludge heavy-metal Refining recovery and treatment method, heavy metal soil or waste are formed containing heavy metal control of dust thing or mud via processing, it is characterized in that, this heavy metal control of dust thing or mud refining treatment method comprise the following steps:
    A1, containing heavy metal control of dust thing physical purification program, produces the ore in sand form of high density heavy metal compound composition;
    A2 drying program; By the ore in sand form moisture removal of a1 program;
    A3 ore in sand form hybrid conductive flour sand and reductive agent program;
    A4 high frequency electric current induction heating ream weight metal gasification program, makes the heavy metal gasification of ore in sand form by high frequency Electromagnetic Heating to ore in sand form;
    A5 condensation reclaimer, is condensed into liquid or solid-state recovery by gasification heavy metal.
  2. 2. rear control of dust thing or sludge heavy-metal Refining recovery and treatment method are processed in heavy-metal contaminated soil as claimed in claim 1 or waste regulation, it is characterized in that: described a1 carries out physical property washup operation containing heavy metal control of dust thing physical purification program by the dust thing that contains after treatment heavy metal compound, and obtain the heavy metal compound composition ore in sand form of greater concn, described a3 ore in sand form hybrid conductive flour sand and reductive agent program add suitable conductive carbon dust and iron sand to be mixed according to ore in sand form ratio again, and heavy metal compound adds calcium oxide as reductive agent depending on concentration ratio while containing sulfide composition.
  3. 3. rear control of dust thing or sludge heavy-metal Refining recovery and treatment method are processed in heavy-metal contaminated soil as claimed in claim 1 or waste regulation, it is characterized in that: described a4 high frequency induction heating ream weight metal gasification program imports high frequency induction region by this ore in sand form containing conductive carbon dust and iron sand powder makes carbon and iron sand produce eddy current effects heating, and make in ore in sand form the gasification of being heated of heavy metal compound component substances.
  4. 4. rear control of dust thing or sludge heavy-metal Refining recovery and treatment method are processed in heavy-metal contaminated soil as claimed in claim 3 or waste regulation, it is characterized in that: described high frequency induction heating adopts high frequency heating unit, and this high frequency heating unit has a feed chamber, a heating chamber ,Yi unloading house, a supply unit, a ruhmkorff coil group, and this feed chamber has lid, and can closely sealed feed chamber; This heating chamber has entrance and is connected with feed chamber again, and has outlet and be connected with unloading house, and this heating chamber outer wall is isolator again; Supply unit has motor again, and this motor interlock feed worm, again this feed worm group in heating chamber, and entrance and the outlet position of the corresponding heating chamber in two ends, and this feed worm is conductive metal material manufacture; This ruhmkorff coil is mounted on heating chamber outside again, and high frequency electromagnetic field in can producing during by middle high frequency electric current, and makes feed worm produce eddy current heating as boosting source; You Gai unloading house is connected with heating chamber outlet, and discharge gate, bleeding point are set.
  5. 5. rear control of dust thing or sludge heavy-metal Refining recovery and treatment method are processed in heavy-metal contaminated soil as claimed in claim 1 or waste regulation, it is characterized in that: during described a5 condensation reclaimer exhaust, carry out a51 exhaust detecting and cycle heat treatment program again.
  6. 6. rear control of dust thing or sludge heavy-metal Refining recovery and treatment method are processed in heavy-metal contaminated soil as claimed in claim 5 or waste regulation, it is characterized in that: aforementioned heating chamber sets into device of air, and this enters device of air and conduit is set connects outside air feed equipment and connection condensation reclaimer and reflux and process gas again, and Set scale formula air valve, under meter are to control air input, described bleeding point is connected with extraction pipe, vacuum fan again, and in this extraction pipe, strainer is set, and extraction pipe strainer outer rim arranges high frequency electromagnetic induction coil group.
  7. 7. rear control of dust thing or sludge heavy-metal Refining recovery and treatment method are processed in heavy-metal contaminated soil as claimed in claim 6 or waste regulation, it is characterized in that: described a5 condensation reclaimer imports condensing equipment by heavy metal vapor and is condensed into liquid or solid-state to reclaim high purity heavy metal, and this condensing equipment has condensing chamber, and this condensing chamber has entrance and connects aforementioned extraction pipe, and there is export mouth, venting port, refrigeration equipment is set again, heavy metal vapor being imported in condensing chamber can rapid coagulation become liquid or solid-state derives high purity heavy metal by export mouth again and reclaims, this venting port can be discharged the gas of desorption heavy metal again, conduit and extraction pipe that the venting port of this condensing equipment and aforementioned high frequency heating unit enter device of air are connected to form circulation loop, and gas sensing instrument is set, proportion expression air valve is to process venting port Exhaust Gas importing heating chamber or condensing chamber again depending on demand.
  8. 8. rear control of dust thing or sludge heavy-metal Refining recovery and treatment method are processed in heavy-metal contaminated soil as claimed in claim 1 or waste regulation, it is characterized in that: after aforementioned a5 condensation reclaimer, can carry out again a6 vent gas treatment program, and this vent gas treatment program can absorb by the atomic free heavy metal gas of condensation reclaimer discharge, to avoid this free heavy metal gas directly to discharge atmosphere.
  9. 9. rear control of dust thing or sludge heavy-metal Refining recovery and treatment method are processed in heavy-metal contaminated soil as claimed in claim 7 or waste regulation, it is characterized in that: after aforementioned a5 condensation reclaimer, can carry out again a6 vent gas treatment program, and this vent gas treatment program can absorb by the atomic free heavy metal gas of condensation reclaimer discharge, to avoid this free heavy metal gas directly to discharge atmosphere.
  10. 10. rear control of dust thing or sludge heavy-metal Refining recovery and treatment method are processed in heavy-metal contaminated soil as claimed in claim 9 or waste regulation, it is characterized in that: this a6 vent gas treatment program has absorption chamber, and this absorption chamber has entrance and connects aforementioned venting port, and there is outlet, can or the free heavy metal of activated carbon adsorption be set by sulfuration absorption again, and the heating chamber that can import again aforementioned high frequency heating unit after this activated carbon use is processed, this absorption chamber outlet is connected with heating tail end chamber again, and this heating tail end chamber has entrance to import aforementioned absorption chamber Exhaust Gas, and gas inlet is set, heating unit and tail gas outlet are set again, the air mixed that can import oxygen rich air with outside while making to import heating tail end chamber by absorption chamber outlet Exhaust Gas is again via being discharged by tail gas outlet after reacting by heating again.
CN201310480943.4A 2013-10-15 2013-10-15 Refining purifying recycling processing method of heavy metal from collected dust or sludge obtained from processing of heavy metal polluted soil or waste CN103540753A (en)

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CN2727189Y (en) * 2004-08-24 2005-09-21 上海申光照明电器有限公司 Heating furnace for treating mercury-containing waste residues
CN1676636A (en) * 2005-04-22 2005-10-05 张云一 Regenerative metal electromagnetic induction smelting method
CN2820364Y (en) * 2005-08-11 2006-09-27 灿环科技有限公司 Dry distilling processing device

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Application publication date: 20140129