CN1846884A - Method for removing mercury from mercury pollution materials - Google Patents
Method for removing mercury from mercury pollution materials Download PDFInfo
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- CN1846884A CN1846884A CN 200510064399 CN200510064399A CN1846884A CN 1846884 A CN1846884 A CN 1846884A CN 200510064399 CN200510064399 CN 200510064399 CN 200510064399 A CN200510064399 A CN 200510064399A CN 1846884 A CN1846884 A CN 1846884A
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Abstract
The microwave method of reducing mercury content in mercury contaminated material includes the following steps: 1. setting the mercury contaminated material inside one microwave reactor; 2. providing airflow to the microwave reactor to stir the mercury contaminated material; and 3.exposing the mercury contaminated material to microwave radiation to raise the temperature to over 357 deg.c, so as to produce vapor containing mercury and the treated material. The said method may be also used to reduce contents of mercury and carbon simultaneously, and some no-carbon material may be used in the reactor.
Description
Technical field
The present invention relates to a kind of method that reduces mercury content in the mercury pollution materials.In particular, the present invention relates to use microwave energy to reduce mercury content in flying dust and the sorbing material.
Background technology
Mercury be present in from industrial incinerator and boiler (such as, be used for coal combustion and handle with generation steam or remove the industrial incinerator and the boiler of refuse to produce air-flow/electricity or to be used for MSW) the known contaminant of gas-flow.The high environmental toxicity saying of mercury is fully set up, and therefore, the mercury washing has become necessity (though expensive) part of exhaust-gas treatment.
Can wash by the mercury that Several Methods is finished from waste gas stream, described method is variable on complexity, cost and validity.These methods comprise adsorbent (carbon or alkali) filtration, oxidation, chlorination and other method.
The carbon adsorption filtration is known in affiliated field, and it utilizes the known adsorpting characteristic of thin carbon, given activity carbon.Some kinds of carbon adsorption technologies have been disclosed and have put into practice.For example, people's such as Chang United States Patent (USP) has been lectured for the 6th, 558, No. 454 enough carbon raw material being activated under the temperature of fertile absorber, and carbon raw material is injected the mercury pollution air-flow.People's such as Pennline United States Patent (USP) discloses a kind of method of recirculation half coal combustion for the 6th, 521, No. 021, and described coal has converted hot active carbon adsorption stream to and then has been incorporated into main chamber again.People's such as Wojtowicz United States Patent (USP) the 6th, 103, No. 205 and the 6th, 322, disclosed a kind of carbon raw material for No. 613 and made the method for carbon adsorbent, comprising method by hot gas evaporation and the necessary subsequently treated highly enriched rich mercury vapour stream reproducing adsorbent of generation by pyrolysis such as damaged tire.
The United States Patent (USP) of Knowles has been lectured automatic accessory substance---the natural filtering feature (that is, low particle size and high surface area mass ratio) of flying dust owing to coal combustion for the 5th, 787, No. 823, so used as sorbing material.Knowles does not discuss may influencing of carbon in the flying dust (not firing dyestuff), does not discuss absorption fly ash granule and the absorption independent effect that carbon granule play yet.People's such as Bhat United States Patent (USP) has been lectured the injection of activated carbon for the 5th, 672, No. 323 as being used for the exhaust-gas treatment that mercury removes.
People's such as Madden United States Patent (USP) has disclosed use alkali adsorbent (such as, lime stone) for the 6th, 372, No. 187, then carries out micro particle filtering, with the method as the removal of mercury of drifting from waste gas.
All adsorption technologies all cause forming rich mercury particulate, this particulate be captured in certain bag house or other the similar slotware in case before being discharged into atmosphere from waste gas stream separating particles.Inevitably, rich mercury particle complex will comprise that mercury, sorbing material and some may remove early stage remaining flying dust of escaping of stage at flying dust.At last, this particle complex must (for example) by carburizing, processing such as bury or handle fully to reduce its volume or reproducing adsorbent by the described material of further processing.If reproducing adsorbent just can be avoided or part compensates the expensive of adsorbent displacement,, just further concentrate mercury so that the mercury absorbent volume reduces substantially, thereby allow more effective collection or processing if reduce volume.From the viewpoint of environmental protection, ideal situation is that all mercury that were present in originally in the coal fuel should finally be collected with steerable molecule or element form.
Think that the mercury absorbent mixture is that the material that needs separately to handle can make the people consider to remove from mixture the method for mercury.A kind of said method is to come pyrolysis mercury by material being heated to the mercury evaporating point, then uses than the initial more effective mercury of mercury sorbing material that produces and removes technology.This is similar in many aspects with the problem that removes mercury from mercury contaminated soil and industrial materials.
For example, people's such as Gale United States Patent (USP) has disclosed a kind of method of using electric furnace distillation mercury from drying, bulk material for the 6th, 268, No. 590, and wherein this material transmits by the electric furnace spiral.Use condenser from waste gas stream, to remove mercuryvapour.Because the method for Gale is continuous and has practical size and complexity, so the advantage of the previous method of announcement in No. the 1st, 599,372, the United States Patent (USP) of No. the 5th, 569,154, the United States Patent (USP) that Gale advocates to be better than Navetta and Reed.
The United States Patent (USP) of Hanulik has disclosed a kind of rotation tube furnace the 6th, 024, No. 931, and wherein the material adverse current is delivered to combustion flame.People's such as Washburn United States Patent (USP) has been lectured a kind of batch distillating method the 5th, 891, No. 216 and the 5th, 989, No. 486, comprises using rabbling mechanism with the auxiliary mercuryvapour that discharges evaporation.People's such as Evans United States Patent (USP) has disclosed a kind of revolving burner the 5th, 782, No. 188, and it serves as the pyrolysis incinerator when not having air, and combustible gas stream is condensed into various product streams through above-mentioned revolving burner.The United States Patent (USP) of Meador has disclosed a kind of method for pyrolysis the 5th, 632, No. 863, can then handle old and useless battery by this method.People's such as Lindgren United States Patent (USP) has been described a kind of method the 5th, 567, No. 223, exists under the situation of selenium in smelting furnace the heating mercury pollution materials forming mercury selenide in thermal current whereby, thereby is staying the decontamination material for other purposes.
Though each in these methods all satisfies the function needs of the processing that is provided for reducing mercury content in the mercury pollution materials, still needs more effective and more economical method.In addition, in some cases,, for example, need also reduce the carbon content in the material usually such as in flying dust is handled.Thereby, need a kind of allow to reduce simultaneously the mercury in the mercury pollution materials and the method for carbon content.
Therefore, one object of the present invention is to provide a kind of improving one's methods of mercury of reducing from mercury pollution materials.Described method is used microwave energy.
Another object of the present invention is to provide a kind of permission to reduce the mercury in the mercury pollution materials and the method for carbon content simultaneously by using microwave energy.
Another object of the present invention is to provide in the method according to the invention the use bubbling fluidized bed.
Another object of the present invention is to provide in the method according to the invention use main bed material (hostbed material).
Summary of the invention
The present invention discloses a kind of method and Agencies spare, uses microwave energy pyrolysis mercury from the mercury pollution solid mixture of being made up of flying dust and sorbing material whereby.By the method, mercury generates with the vapours form in the air-flow, is condensed subsequently, and stays solid residue, that is, flying dust maybe can re-use or the sorbing material of cleaning.
Method of the present invention comprises uses microwave energy to evaporate necessary heat so that mercury to be provided, and need not any flame or burning gases.The Agencies spare (for example, metal fluidized bed container, the mercury material is sent to wherein and from it continuously to be removed, and microwave energy is incorporated into wherein) that is used for the method is for closely and effective equipment, and it has some advantage that is better than other distiller and pyrolysis apparatus.
In this case, the basic system that is used for heating using microwave is the combination of dielectric and Ohmic heating, utilizes dielectric displacement and conductive electric current directly to convert electromagnetic energy to heat in described material whereby.The efficient of this power conversion depends on the dielectric property of pending material.In this case, flying dust and sorbing material all contain the considerable element of volume that is subjected to, and are mainly carbon, and it can be heated rapidly in a controlled manner.Depress at normal atmosphere, when temperature is elevated to about 357 ℃ (boiling point of mercury), the mercury evaporation.
Use the bubbling fluidized bed reactor vessel that some real advantage can be provided, comprising: the natural separation that the oneself of microwave energy keeps, the stirring naturally of material continuously flows into flow container and efflux of solids and air-flow with auxiliary flushing mercuryvapour, material.
According to first aspect, the invention provides a kind of method that reduces mercury content in the mercury pollution materials, it comprises: mercury pollution materials is placed in the microwave reactor; One air-flow is provided in described microwave reactor, and described air-flow causes the stirring of described mercury pollution materials; And described mercury pollution materials is exposed under the microwave radiation to raise the temperature to 357 ℃ at least, contain the vapour phase that mercury and one is handled material thereby produce.
According to second aspect, the invention provides a kind of method that reduces mercury content in the mercury pollution materials, it comprises: a carbon-free material is placed in the microwave reactor; Described mercury pollution materials is placed in the described microwave reactor; One air-flow is provided in described microwave reactor, and described air-flow causes that the stirring of described mercury pollution materials and described carbon-free material is to form a mixture; And described mercury pollution materials is exposed under the microwave radiation to raise the temperature to 357 ℃ at least, contain the vapour phase that mercury and one is handled material thereby produce.
According to the third aspect, the invention provides a kind of method that reduces mercury and carbon content in the mercury pollution materials, it comprises: mercury pollution materials is placed in the microwave reactor; One air-flow is provided in described microwave reactor, and described air-flow causes the stirring of described mercury pollution materials; And described mercury pollution materials is exposed under the microwave radiation to raise the temperature to 600 ℃ at least, contain the vapour phase that mercury and one is handled material thereby produce.
According to fourth aspect, the invention provides a kind of method that reduces mercury and carbon content in the mercury pollution materials, it comprises: a carbon-free material is placed in the microwave reactor; Described mercury pollution materials is placed in the described microwave reactor; One air-flow is provided in described microwave reactor, and described air-flow causes that the stirring of described mercury pollution materials and described carbon-free material is to form a mixture; And described mercury pollution materials is exposed under the microwave radiation to raise the temperature to 600 ℃ at least, contain the vapour phase that mercury and one is handled material thereby produce.
First and the preferred embodiment of the third aspect in, described method can further comprise the following step: remove vapour phase from reactor; Stop the microwave radioactive exposure; From reactor, remove the processing material; And new mercury pollution materials is incorporated in the reactor.Equally, of the present invention second and the preferred embodiment of fourth aspect in, described method can further comprise the following step: remove vapour phase from reactor; Stop the microwave radioactive exposure; From reactor, remove the processing material; New carbon-free material is incorporated in the reactor; And new mercury pollution materials is incorporated in the reactor.
Ground preferably, above-mentioned steps can be continuous, and described method can further comprise according to circumstances vapour phase is incorporated into step in the filter element (such as cyclone separator).The method according to this invention also can comprise the vapour phase that will contain mercury and trap other step in the container.
The microwave reactor of Shi Yonging is preferably the fluidized bed vessel device in the method for the invention, and the frequency of microwave radiation can be between about 300MHz and about 30GHz.Described frequency is preferable can be in industry, science and medical science (ISM) frequency band of about 915MHz and 2450MHz.Microwave irradiation power level and processing duration enough are enough to produce can be in the particular energy between about 2kW-h/t and the about 20kW-h/t.
Of the present invention above-mentioned second and fourth aspect in the mercury pollution materials and the ratio of carbon-free material can be between about 25/75 and about 75/25.This ratio is preferably about 50/50.Mercury pollution materials can have the mercury content up to 50 weight %, and the material that utilizes the method according to this invention to handle can have the mercury content less than about 10ppb.The mercury content of handling material is preferable less than 5ppb.The carbon content of mercury pollution materials can be up to 60 weight %.
According to the 6th aspect, provide a kind of equipment that is specially adapted to carry out the method according to this invention.
Reduce the method for the mercury content of mercury pollution materials according to the present invention and use microwave energy, it is effective, economical and general.
Description of drawings
Read following detailed description and with reference to will easily understanding these and other advantage of the present invention after graphic, wherein:
Fig. 1 is the schematically showing of equipment that is used to carry out the embodiment of the method according to this invention.
Though described the present invention in conjunction with illustrative embodiment, should be appreciated that, have no intention the present invention is limited to this embodiment.On the contrary, it is intended to contain and can be included in the spirit of the present invention that defined by the accessory claim book and in the category all substitute, modification and equivalent.
The specific embodiment
With reference to figure 1, it illustrates a preferred embodiment of the present invention, in a continuous manner the input feedstream (1) of mercury pollution materials is introduced in the microwave reactor container (2) that can serve as the bubbling fluidized bed operation.Operating in this technology of bubbling fluidized bed is known.What this preferred embodiment was indispensable is the use that binary is formed fluid bed, and it is made up of mercury pollution materials and main bed material.Described main bed material is chosen as carbon-free basically mineral, and it is not subjected to the influence of ensuing processing, and it can stand the operating condition of described processing and not have chemistry or mechanical influence.Described main bed material further describes size distribution and the density that is sufficiently more than sorbing material for having so that sorbing material in reactor vessel more the height fluidisation.However, the dynamic action of main bed material makes winner's bed material and sorbing material feedstream form single, an integrated fluidized bed medium in reactor vessel.Except above-mentioned its size and density attributes, main bed material is chosen as that microwave is accepted material so that its direct attribute of irrelevant other interior material by the microwave energy heating.Found to use this binary that accounts for main material at least 50 weight % ratios to form fluid bed, can allow under remarkable higher temperature, to carry out described processing and do not cause and therefore cause higher specific yield by sorbing material fusion or the sintering that is rich in carbon.
Supply material (1) in the reactor vessel (2) forms fluid bed by means of the air-flow that flows into reactor base by nozzle in the solid panel or intensive aperture system, thereby material effectively is suspended in the reactor vessel.This aspect of fluidized bed process is determined by the required gas velocity of effective suspension material, and knows for described those skilled in the art.Fluidizing gas passes reactor vessel and discharges from filter element (4), and this filter element for example is a cyclone separator, and it can remove the finely particulate that all or major part are carried secretly from air-flow.The air-flow (5) of existing essentially no particulate can be used for further processing, such as removing mercury.
Constantly remove the material of sending in the reactor vessel (for example being undertaken), and it is collected in hopper (7) or other proper container for further handling or using by overflow pipe (6).
The device (being generally waveguide (9)) that is attached to described reactor vessel connects a microwave generator (8), microwave obstacle (10) wherein is installed to isolate the reactor vessel atmosphere from described waveguide effectively.
To reactor vessel supply microwave energy, described reactor vessel is made of the microwave field of being introduced effectively to hold wherein the proper metal material.When the fluidised material in the contact reactor container, most of microwave energy is converted into heat, thereby improved the temperature of fluid bed.Microwave energy is coupled to the efficient of fluid bed material by tuning device (11) control that is installed in the waveguide.Can the electronics mode control these tuning devices to continue to optimize power transfer.When fluidized-bed temperature is issued to the boiling point of mercury or during near 357 ℃, mercury enters vapour phase and taken out of container in the fluidisation air-flow at standard atmospheric pressure.If people think the burning bed material, fluidizing gas can be surrounding air so, maybe described gas can be chosen as mercury and carbon are inertia (for example nitrogen), so the heating process in the reactor vessel just can not burnt sorbing material.
The thermal current that leaves reactor vessel passes cyclone separator as described above.Because gas temperature maintains more than the mercury boiling point, so mercuryvapour is carried to gas outlet pipe (5), mercuryvapour is condensed or otherwise filters to reclaim herein.
Mix with other discharge solid (7) from the isolated particulate (12) of carrying secretly of cyclone separator.
As known in the fluidization, in the material stream of inflow or outflow reaction vessel (and cyclone separator), adopt various valves (13) to stop the gas leakage.
In order to monitor and control heating process, various instruments (14) are installed in the equipment.Temperature probe is installed in fluid bed and all are sent into and the diverse location of discharge pipe (comprising gas input and output pipeline).Gas pressure and product monitor are installed in all gas pipeline.Measure flow of material by flowmeter or by mass measurement by reactor vessel.So the system of assembling with instrument can be by hand or operates automatically to keep system and move in maximum figure in the minimum of setting.
Mix a main material by an independent feed stream (15), described feed stream (15) fuses with the contaminated materials feed stream and is controlled, the loss when passing through reactor to compensate main bed material.If desired, can from the regeneration sorbing material, isolate main bed material (for example, by flotation or Gravity Separation) and can be recycled to the input hopper for re-using.
According to a preferred embodiment of the present invention, when using the inert gas fluidisation, mercury pollution materials can be cleared out of mercury effectively and not burn, thereby allows to re-use sorbing material.As described above, can effectively capture the mercury of release.The method of this distillation mercury mainly is because the use microwave energy produces the efficient and the speed of heat, and has the distinct advantages that is better than other heater.
Example 1
The equipment that assembling schematically illustrates as Fig. 1 is to handle a certain amount of known mercurous coal combustion flying dust.Use the microwave frequency of 915MHz.Fluidizing gas is a surrounding air.
Under about 820 ℃ temperature, handle the charging flying dust.At the test period of whole about 400 minute duration, described material passes reactor vessel with the speed of about per minute 6 pounds (lbs).
Mercury content in the charging is through being measured as 79/1000000000ths (ppb).Unburned carbon content (feature shows as LOI (loss on ignition)) is through being measured as 8.5%.
Regularly obtain treated grey sample, and measure mercury content from experiment.The gained result is illustrated in the following table 1.The LOI of treated material is 1.5%.
Table 1 mercury measurement
| Time (minute) | Product mercury (ppb) | Whirlwind mercury (ppb) |
| 0 | 79 | 79 |
| 167 | 22 | 23 |
| 197 | 11 | 1 |
| 392 | 8 | 2 |
| 419 | 7 | 3 |
Can find out from table, reach steady state operation in case the relative mercury of described processing is separated out, relative its initial value of mercury content of discharging material (product and whirlwind discharging) reduces substantially.But rational prediction goes out and can further reduce mercury content by the delivery rate that slows down, and the mean residence time of material in reactor increases like this.Yet the treatment effect that reduces mercury concentration is significant.
Example 2
The equipment that assembling schematically illustrates as Fig. 1 is to handle a certain amount of known mercurous coal combustion flying dust.Use the microwave frequency of 915MHz.Fluidizing gas is a surrounding air.
Under about 820 ℃ temperature, handle the charging flying dust.At the test period of whole about 500 minute duration, described material passes reactor vessel with the speed of about per minute 6 pounds (lbs).
Mercury content in the charging is through being measured as 33/1000000000ths (ppb).Unburned carbon content (feature shows as LOI (loss on ignition)) is through being measured as 17.5%.
Regularly obtain treated grey sample, and measure mercury content from experiment.The gained result is illustrated in the following table 2.The LOI of treated material is 0.4%.
Table 2 mercury measurement
| Time (divides | Product mercury | Whirlwind mercury |
| 0 | 33 | 33 |
| 185 | 25 | 15 |
| 481 | 3 | 7 |
Example 3
The equipment that assembling schematically illustrates as Fig. 1 is to handle a certain amount of known mercurous coal combustion flying dust.Use the microwave frequency of 915MHz.Fluidizing gas is a surrounding air.
Under about 820 ℃ temperature, handle the charging flying dust.At the test period of whole about 400 minute duration, described material passes reactor vessel with the speed of about per minute 6 pounds (lbs).
Mercury content in the charging is through being measured as 1 142 (ppb).Unburned carbon content (feature shows as LOI (loss on ignition)) is through being measured as 4.5%.
Regularly obtain treated grey sample, and measure mercury content from experiment.The gained result is illustrated in the following table 3.Final LOI is 0.3%.
Table 3 mercury measurement
| Time (minute) | Product mercury (ppb) | Whirlwind mercury (ppb) |
| 0 | 142 | 142 |
| 187 | 8 | 7 |
| 230 | 8 | 1 |
| 300 | 2 | 1 |
| 337 | 8 | 1 |
Can find out obviously that from above-mentioned example method disclosed herein can have nothing to do in the initial mercury content of described material or its LOI and effectively reduces mercury concentration.
Although the example that this paper quoted carries out in the microwave frequency of 915MHz, promptly under one of electromagnetism ISM (industry, science, medical science) frequency band of the easy acquisition that is used to not have permit operation, carry out, use usually any frequency in microwave region (300MHz-30GHz) all to belong to scope of the present invention, with the technical staff of microwave regime the mode fully understood, it mainly influences the size of resonant reactive container.
In the example of above being quoted, be primarily aimed at the burning unburned carbon contained in the ash and the volatilization of mercury because handle operation, so fluidizing gas is a surrounding air.Put into practice as the present inventor, in the mode of direct similar and above-mentioned example, available inert gas (for example nitrogen) replaces surrounding air, thereby although cause not having any burning, material can effectively heat (absorbing owing to microwave).
Also should note, although above-mentioned example uses about 820 ℃ operating temperature with the unburned carbon of burning from ash, but evaporation mercury only need reach 357 ℃ temperature (under normal atmosphere pressure), therefore the method according to this invention can be under 357 ℃ the temperature or be higher than (under the normal atmosphere pressure) operation under this temperature, and its restrictive condition only be to surpass grey component significantly to fuse and coalescent temperature; Known this condition of the technical staff of the metallurgical process field of mineral and ore.
Although the example of quoting has utilized a reactor vessel by the known principle operation of bubbling fluidized bed, utilize other container design that is suitable for use as the MICROWAVE PROTECTION shell all to belong to scope of the present invention.It includes, but is not limited to rotary furnace, vibration drum, multimode cavity (multimode cavity), transportation fluid bed (transport fludized bed), fills pipe (packed tube), transmissionization chamber (conveyorized cavity).
Therefore a kind of method of using microwave energy to reduce mercury content in the mercury pollution materials obviously is provided according to the present invention, and it satisfies above demand and advantage fully.Although describe the present invention in conjunction with illustrated embodiment, the those skilled in the art understands many alternative, modifications and variations easily according to above describing obviously.Therefore, it is intended to be encompassed in all alternative, modifications and variations in the present invention's spirit and the broad range.
Claims (44)
1. method that reduces mercury content in the mercury pollution materials, it comprises the following step:
(a) described mercury pollution materials is placed in the microwave reactor;
(b) provide a air-flow from substantially introducing under described mercury pollution materials, wherein said gas and mercury pollution materials form a fluid bed in described microwave reactor, and described air-flow causes described mercury pollution materials stirring; With
(c) described mercury pollution materials is exposed under the microwave radiation to raise the temperature to, contains the vapour phase that mercury and one is handled material thereby produce one at least about 357 ℃.
2. method that reduces mercury content in the mercury pollution materials, it comprises the following step:
(a) carbon-free material is placed in the microwave reactor;
(b) described mercury pollution materials is placed in the described microwave reactor;
(c) provide a air-flow from substantially introducing under described mercury pollution materials, wherein said gas and mercury pollution materials form a fluid bed in described microwave reactor, and described air-flow causes that described mercury pollution materials and the stirring of described carbon-free material are to form a mixture; With
(d) described mercury pollution materials is exposed under the microwave radiation to raise the temperature to, contains the vapour phase that mercury and one is handled material thereby produce one at least about 357 ℃.
3. method that reduces mercury and carbon content in the mercury pollution materials, it comprises the following step:
(a) described mercury pollution materials is placed in the microwave reactor;
(b) provide a air-flow from substantially introducing under described mercury pollution materials, wherein said gas and mercury pollution materials form a fluid bed in described microwave reactor, and described air-flow causes described mercury pollution materials stirring; With
(c) described mercury pollution materials is exposed under the microwave radiation to raise the temperature to, contains the vapour phase that mercury and one is handled material thereby produce one at least about 600 ℃.
4. method that reduces mercury and carbon content in the mercury pollution materials, it comprises the following step:
(a) carbon-free material is placed in the microwave reactor;
(b) described mercury pollution materials is placed in the described microwave reactor;
(c) provide a air-flow from substantially introducing under described mercury pollution materials, wherein said gas and mercury pollution materials form a fluid bed in described microwave reactor, and described air-flow causes that described mercury pollution materials and the stirring of described carbon-free material are to form a mixture; With
(d) described mercury pollution materials is exposed under the microwave radiation to raise the temperature to, contains the vapour phase that mercury and one is handled material thereby produce one at least about 600 ℃.
5. method according to claim 1, it further comprises the following step:
(d) from described reactor, remove described vapour phase;
(e) exposure of termination microwave radiation;
(f) from described reactor, remove described processing material; With
(g) new mercury pollution materials is incorporated in the described reactor.
6. method according to claim 3, it further comprises the following step:
(d) from described reactor, remove described vapour phase;
(e) exposure of termination microwave radiation;
(f) from described reactor, remove described processing material; With
(g) new mercury pollution materials is incorporated in the described reactor.
7. method according to claim 2, it further comprises the following step:
(e) from described reactor, remove described vapour phase;
(f) exposure of termination microwave radiation;
(g) from described reactor, remove described processing material;
(h) new carbon-free material is incorporated in the described reactor; (i) new mercury pollution materials is incorporated in the described reactor.
8. method according to claim 4, it further comprises the following step:
(e) from described reactor, remove described vapour phase;
(f) exposure of termination microwave radiation;
(g) from described reactor, remove described processing material;
(h) new carbon-free material is incorporated in the described reactor; With
(i) new mercury pollution materials is incorporated in the described reactor.
9. method according to claim 5, wherein step (d) to (g) occurs in sequence.
10. method according to claim 6, wherein step (d) to (g) occurs in sequence.
11. method according to claim 7, wherein step (e) to (i) occurs in sequence.
12. method according to claim 8, wherein step (e) to (i) occurs in sequence.
13. method according to claim 5, it further comprises described vapour phase is incorporated into step in the filter element.
14. method according to claim 6, it further comprises described vapour phase is incorporated into step in the filter element.
15. method according to claim 7, it further comprises described vapour phase is incorporated into step in the filter element.
16. method according to claim 8, it further comprises described vapour phase is incorporated into step in the filter element.
17. method according to claim 13, wherein said filter element are a cyclone separator.
18. method according to claim 14, wherein said filter element are a cyclone separator.
19. method according to claim 5, it further comprises the described vapour phase that contains mercury is trapped step in the container.
20. method according to claim 6, it further comprises the described vapour phase that contains mercury is trapped step in the container.
21. method according to claim 7, it further comprises the described vapour phase that contains mercury is trapped step in the container.
22. method according to claim 8, it further comprises the described vapour phase that contains mercury is trapped step in the container.
23. method according to claim 1, wherein said microwave reactor are a fluidized-bed reactor container.
24. method according to claim 1, wherein said microwave radiation have a frequency between 300MHz and 30GHz.
25. method according to claim 24, wherein said frequency is between 900MHz and 3000MHz.
26. method according to claim 24, wherein said frequency is in industry, science and medical science (ISM) frequency band of about 915MHz and 2450MHz.
27. method according to claim 3, wherein said microwave radiation have a frequency between 300MHz and 30GHz.
28. method according to claim 27, wherein said frequency is between 900MHz and 3000MHz.
29. method according to claim 27, wherein said frequency is in described industry, science and medical science (ISM) frequency band of about 915MHz and 2450MHz.
30. method according to claim 1 is wherein used the microwave irradiation power level and processing duration that are enough to produce the particular energy between a 2kW-h/t and the 20kW-h/t.
31. method according to claim 30, wherein said microwave irradiation power level and processing duration are between 2kW-h/t and 5kW-h/t.
32. method according to claim 3 is wherein used the microwave irradiation power level and processing duration that are enough to produce the particular energy between a 4kW-h/t and the 20kW-h/t.
33. method according to claim 2, wherein use one between 25: 75 and 75: 25 mercury pollution materials and the ratio of carbon-free material.
34. method according to claim 33, wherein said ratio are about 50: 50.
35. being selected from by surrounding air and a pair of mercury and carbon, method according to claim 1, wherein said gas be the group that inert gasses is formed.
36. method according to claim 35 wherein is selected from nitrogen and carbon dioxide to the described gas that mercury and carbon are inertia.
37. method according to claim 1, wherein said gas is inertia to mercury and carbon.
38. method according to claim 1, the mercury content in the wherein said mercury pollution materials is up to about 50 weight %.
39. method according to claim 3, the carbon content in the wherein said mercury pollution materials is up to about 60 weight %.
40. method according to claim 2, wherein said carbon-free material is that its Size Distribution and density are accepted material greater than the microwave of described mercury pollution materials, and is selected from the group that is made up of manganese dioxide, silica, metal oxide, oxide containing silicon (silicaceous oxide) and its mixture.
41. according to the described method of claim 40, wherein said carbon-free material is selected from the group that is made up of manganese dioxide and silica.
42. method according to claim 1, the mercury content of wherein said processing material is less than about 10ppb.
43. according to the described method of claim 42, wherein said mercury content is less than about 5ppb.
44. a method that reduces mercury content in the mercury pollution materials in the processing that can keep continuously, it comprises the following step:
(a) described mercury pollution materials is placed in the microwave reactor;
(b) provide a air-flow from substantially introducing under described mercury pollution materials, wherein said gas mercury pollution materials forms a fluid bed in described microwave reactor, and described air-flow causes described mercury pollution materials stirring; With
(c) described mercury pollution materials is exposed under the microwave radiation to raise the temperature to, contains the vapour phase that mercury and one is handled material thereby produce one at least about 357 ℃.
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| CN 200510064399 CN1846884A (en) | 2005-04-15 | 2005-04-15 | Method for removing mercury from mercury pollution materials |
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| CN 200510064399 CN1846884A (en) | 2005-04-15 | 2005-04-15 | Method for removing mercury from mercury pollution materials |
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| CN 200510064399 Pending CN1846884A (en) | 2005-04-15 | 2005-04-15 | Method for removing mercury from mercury pollution materials |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102489148A (en) * | 2011-11-23 | 2012-06-13 | 山东大学 | Method for cyclic removal of CO2 from boiler flue gas with microwave calcined calcium-based absorbent |
| CN102645087A (en) * | 2012-05-17 | 2012-08-22 | 中山大学 | Drying method of watertight pills |
| CN103418597A (en) * | 2013-06-03 | 2013-12-04 | 北京博朗德科技有限公司 | System for treating mercury-containing rock core |
| CN109807166A (en) * | 2019-04-10 | 2019-05-28 | 智优株式会社 | For removing the contaminated soil microwave thermal desorption purification device and method of mercury |
-
2005
- 2005-04-15 CN CN 200510064399 patent/CN1846884A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102489148A (en) * | 2011-11-23 | 2012-06-13 | 山东大学 | Method for cyclic removal of CO2 from boiler flue gas with microwave calcined calcium-based absorbent |
| CN102489148B (en) * | 2011-11-23 | 2013-09-18 | 山东大学 | Method and device for cyclic removal of CO2 from boiler flue gas with microwave calcined calcium-based absorbent |
| CN102645087A (en) * | 2012-05-17 | 2012-08-22 | 中山大学 | Drying method of watertight pills |
| CN102645087B (en) * | 2012-05-17 | 2014-09-03 | 中山大学 | Drying method of watertight pills |
| CN103418597A (en) * | 2013-06-03 | 2013-12-04 | 北京博朗德科技有限公司 | System for treating mercury-containing rock core |
| CN103418597B (en) * | 2013-06-03 | 2015-08-12 | 北京博朗德科技有限公司 | A kind of system processing mercurous core |
| CN109807166A (en) * | 2019-04-10 | 2019-05-28 | 智优株式会社 | For removing the contaminated soil microwave thermal desorption purification device and method of mercury |
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