CN102284236B - Equipment for treating gas fume - Google Patents
Equipment for treating gas fume Download PDFInfo
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- CN102284236B CN102284236B CN201110162741.6A CN201110162741A CN102284236B CN 102284236 B CN102284236 B CN 102284236B CN 201110162741 A CN201110162741 A CN 201110162741A CN 102284236 B CN102284236 B CN 102284236B
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Abstract
The invention provides equipment for treating gas fume. The gas fume contains selenium dioxide. The equipment for treating the gas fume comprises a cooling device, a dehydration device, a washing device, a selenium reduction reaction kettle, and a solid and liquid separation device; the cooling device is used for cooling the gas fume so as to obtain the cooled gas fume; the dehydration device is connected with the cooling device and is used for dehydrating the cooled gas fume so as to obtain the dehydrated gas fume; the washing device is connected with the dehydration device and is used for washing the dehydrated gas fume so as to obtain the washed gas fume and washing liquid; the selenium reduction reaction kettle is connected with the washing device and ensures that the washing liquid and sulfur dioxide are subjected to reduction reaction so as to generate mixture containing simple substance selenium; and the solid and liquid separation device is connected with the selenium reduction reaction kettle and is used for separating the mixture containing the simple substance selenium so as to separate and recover selenium. By using the equipment, the selenium in the gas fume can be effectively recovered.
Description
Technical field
The present invention relates to field of metallurgy.Concrete, relate to fume treatment auxiliary.
Background technology
The discussion of following background technology does not also mean that or does not admit that following any method or equipment are a part for prior art or general knowledge as well known to those skilled in the art.
In field of metallurgy, especially, in converting process process, conventionally can produce a large amount of flue gases, the require increasingly stringent of country to environmental protection, thereby flue gas needed to carry out purified treatment before discharge.Yet, for the flue gas that contains selenium dioxide, there is no effective treatment facility and method at present.
Summary of the invention
The present invention is intended at least solve one of technical problem existing in prior art.For this reason, one object of the present invention is to propose a kind of equipment that can effectively process the flue gas that contains selenium dioxide.
According to one embodiment of present invention, provide a kind of fume treatment auxiliary, described flue gas contains selenium dioxide, it is characterized in that, described fume treatment auxiliary comprises: cooling device, and cooling for described flue gas is carried out, obtain through overcooled flue gas; Dewater unit, described dewater unit is connected with described cooling device for dewatering through overcooled flue gas to described, obtains the flue gas through dehydration; Wash mill, described wash mill is connected with described dewater unit for the described flue gas through dehydration is washed, and obtains flue gas and cleaning solution through washing; Selenium reduction reaction still, described selenium reduction reaction still is connected with described wash mill, for making described cleaning solution and sulfur dioxide generation reduction reaction, generates the mixture that contains simple substance selenium; And equipment for separating liquid from solid, described equipment for separating liquid from solid is connected with described selenium reduction reaction still, for the described mixture that contains simple substance selenium is carried out to separation, with separation and reclaim selenium.Utilize this off-gas recovery equipment, can effectively from the flue gas that contains selenium dioxide, reclaim selenium, realize the effect of purifying smoke.
According to embodiments of the invention, fume treatment auxiliary can also have following additional technical feature:
According to one embodiment of present invention, described cooling device is spray cooler.Thus, can realize the effective cooling to flue gas.
According to one embodiment of present invention, described dewater unit is gravity dewatering apparatus.Thus, can utilize gravity dehydration, reduce power consumption.
According to one embodiment of present invention, described wash mill is Venturi scrubber.Thus, can improve the efficiency of washing flue gas.
According to one embodiment of present invention, further comprise sulfur dioxide storage tank, described sulfur dioxide storage tank is connected with described selenium reduction reaction still, for supplying with sulfur dioxide to described selenium reduction reaction still.Thus, can control as required the quantity delivered of sulfur dioxide.
According to one embodiment of present invention, further comprise sulfur dioxide cleaning device, described sulfur dioxide cleaning device is connected with described equipment for separating liquid from solid, for the sulfur dioxide to remaining, absorbs.Thus, further purifying smoke, improves the quality of discharging flue gas.
According to one embodiment of present invention, described equipment for separating liquid from solid is for revolving wet dehydrator, electrostatic precipitator.Thus, can improve the rate of recovery of selenium.
According to one embodiment of present invention, further comprise selenium purification devices, described selenium purification devices is connected with described equipment for separating liquid from solid, for the selenium to separated, carries out purifying.Thus, can obtain purified selenium, improve the quality of products.
According to one embodiment of present invention, described selenium purification devices is comprised of filter-pressing device, slurrying device, wash mill and filter-pressing device.Thus, by press filtration, pulp, washing and press filtration, can access the selenium through being further purified, improve product quality.
According to one embodiment of present invention, described Venturi scrubbing device has hydraulicdriven adjustable trunnion.Thus, can regulate as required the open degree of trunnion, can increase work efficiency, avoid waste.
According to one embodiment of present invention, further comprise gas-liquid separation device, described gas-liquid separation device is connected with described selenium reduction reaction still with described wash mill respectively, to the described flue gas through washing is carried out to gas-liquid separation, the liquid that obtains tail gas and contain selenium dioxide, and the described liquid that contains selenium dioxide is delivered to selenium reduction reaction still.Thus, can reduce Se content in the flue gas of discharge, improve the organic efficiency of selenium simultaneously.
According to one embodiment of present invention, further comprise exhaust gas processing device, described vent gas treatment is connected with described gas-liquid separation device, for described tail gas is processed.Thus, can improve the degree of purification of institute's emission.
Additional aspect of the present invention and advantage in the following description part provide, and part will become obviously from the following description, or recognize by practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present invention and advantage accompanying drawing below combination obviously and is easily understood becoming the description of embodiment, wherein:
Fig. 1 is according to the schematic diagram of the equipment for the treatment of flue gas of the embodiment of the present invention;
Fig. 2 is according to another embodiment of the present invention for the treatment of the schematic diagram of the equipment of flue gas;
Fig. 3 is according to the schematic diagram of the equipment for the treatment of flue gas of further embodiment of this invention;
Fig. 4 is according to the schematic diagram of the equipment for the treatment of flue gas of further embodiment of this invention;
Fig. 5 is according to the schematic flow sheet of the method for the smoke treatment of the embodiment of the present invention; And
Fig. 6 is according to the schematic flow sheet of the method for the smoke treatment of further embodiment of this invention.
The specific embodiment
Describe embodiments of the invention below in detail, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has the element of identical or similar functions from start to finish.Below by the embodiment being described with reference to the drawings, be exemplary, only for explaining the present invention, and can not be interpreted as limitation of the present invention.
In description of the invention, term " longitudinally ", " laterally ", " on ", orientation or the position relationship of the indication such as D score, 'fornt', 'back', " left side ", " right side ", " vertically ", " level ", " top ", " end " be based on orientation shown in the drawings or position relationship, be only the present invention for convenience of description rather than require the present invention with specific orientation structure and operation, therefore can not be interpreted as limitation of the present invention.The term using in the present invention " is connected ", " connection " should be interpreted broadly, and for example, can be to be fixedly connected with, and can be also to removably connect; Can be to be directly connected, also can indirectly be connected by intermediary, for the ordinary skill in the art, can understand as the case may be the concrete meaning of above-mentioned term.
For convenient, understand, the equipment of first flue gas that contains selenium dioxide being processed is described.
A kind of equipment of the flue gas for the treatment of containing selenium dioxide is provided in one aspect of the invention.With reference to figure 1-4, according to one embodiment of present invention, the flow process of processing according to flue gas, fume treatment auxiliary comprises: cooling device, dewater unit, wash mill, selenium reduction reaction still and equipment for separating liquid from solid.Utilize this fume treatment auxiliary, can effectively from the flue gas that contains selenium dioxide, reclaim selenium, realize the effect of purifying smoke.
By the flue gas that contains selenium dioxide is supplied in cooling device, described flue gas is carried out cooling, obtain through overcooled flue gas.According to embodiments of the invention, can be not particularly limited for being applied to the type of flue gas of the present invention, as long as wherein contain selenium dioxide.According to embodiments of the invention, the type of the cooling device that can adopt is not particularly limited, as long as can realize cooling to flue gas.According to one embodiment of present invention, adopt spray cooler, thus, can realize the effective cooling to flue gas, and can reduce costs.Particularly, can adopt compressed air cylinder, tank to be connected with spray cooler, in spray cooler, form water smoke, thus, can realize cooling to flue gas, and can tentatively wash flue gas.The concrete example according to the present invention, can be arranged on tank the top of spray cooler, to utilize gravity to realize, supplies water in cooling device, thus, can guarantee the safe operation of flue gas purification system.
According to embodiments of the invention, dewater unit is connected with described cooling device for to dewatering through overcooled flue gas, obtains the flue gas through dehydration.According to embodiments of the invention, the type of dewater unit is not particularly limited.In a concrete example of the present invention, adopt gravity dewatering apparatus.Thus, can utilize gravity dehydration, reduce power consumption, reduce production cost, improve operating efficiency.
According to embodiments of the invention, wash mill is connected with dewater unit and washs for the flue gas to through dehydration, obtains the flue gas through washing.The mode that flue gas is washed is not particularly limited, and can adopt water to wash flue gas.According to a concrete example of the present invention, adopt Venturi scrubber, utilize water as cleaning solution, flue gas is carried out to circulation cleaning.According to embodiments of the invention, Venturi scrubber comprises contraction section, trunnion and diffuser.Dusty gas enters after contraction section, and flow velocity increases, and entering trunnion is to reach maximum.Cleaning solution adds from contraction section or trunnion, and between gas-liquid two-phase, relative velocity is very large, drop atomization under high velocity air, and gas humidity reaches capacity, and grit is moistening by water.Between grit and drop or grit, there is fierce collision and cohesion.At diffuser, gas-liquid speed reduces, and pressure gos up, and the cohesion that the grit of take is the nuclei of condensation is accelerated, and is condensed into the dust-laden drop that diameter is larger, and then is captured in demister.Thus, can improve the efficiency of washing flue gas.According to concrete example of the present invention, Venturi scrubbing device has hydraulicdriven adjustable trunnion.Thus, can regulate as required the open degree of trunnion, can increase work efficiency, avoid waste.Can adapt to the inhomogenous smelting process of flue gas supply that the converting furnace of intermittent operation produces.
After carrying out carrying out washing treatment, obtain flue gas and cleaning solution through washing.According to embodiments of the invention, selenium reduction reaction still is connected with described wash mill, for making cleaning solution (containing the selenium that is mainly selenous acid form) and sulfur dioxide generation reduction reaction, generates the mixture that contains selenium precipitation.Cleaning solution is supplied in selenium reduction reaction still, with the sulfur dioxide in selenium reduction reaction still, following reaction occurs:
SeO
2+H
2O＝H
2SeO
3
H
2SeO
3+2SO
2+H
2O＝Se↓+2H
2SO
4
Thus, precipitation selenium and sulfuric acid have been generated.According to embodiments of the invention, to the mode of supplying with sulfur dioxide in selenium reduction reaction still, be not particularly limited.According to examples more of the present invention, can adopt sulfur dioxide storage tank is set, described sulfur dioxide storage tank is connected with described selenium reduction reaction still, for supplying with sulfur dioxide to described selenium reduction reaction still.Thus, can control as required the quantity delivered of sulfur dioxide.Can adapt to the inhomogenous smelting process of flue gas supply that the converting furnace of intermittent operation produces.In addition, according to concrete example of the present invention, sulfur dioxide cleaning device can also be further set, described sulfur dioxide cleaning device is connected with described gas-liquid separation device, for the sulfur dioxide to remaining, absorbs.Thus, further purifying smoke, improves the quality of discharging flue gas.Can adopt absorbent for example sodium hydroxide solution the sulfur dioxide in flue gas is absorbed.Applicant finds to utilize the sodium hydroxide solution of 6 % by weight, can guarantee the absorption efficiency of sulfur dioxide.
According to embodiments of the invention, equipment for separating liquid from solid is connected with selenium reduction reaction still, for the described mixture that contains selenium precipitation is carried out to separation, to reclaim selenium.According to embodiments of the invention, the type of the equipment for separating liquid from solid that can adopt is not particularly limited, and can adopt and revolve wet dehydrator, electrostatic precipitator.Thus, can improve the rate of recovery of selenium.According to embodiments of the invention, can also separated selenium be further purified.According to example of the present invention, can adopt selenium purification devices, described selenium purification devices is connected with described equipment for separating liquid from solid, for the selenium to separated, carries out purifying.Thus, can obtain purified selenium, improve the quality of products.Concrete, described selenium purification devices is comprised of filter-pressing device, slurrying device, wash mill and filter-pressing device.Thus, by press filtration, pulp, washing and press filtration, can access the selenium through being further purified, improve product quality.
According to embodiments of the invention, can further include gas-liquid separation device, gas-liquid separation device is connected with selenium reduction reaction still with wash mill respectively, thus, can receive the flue gas through washing from wash mill, and it is carried out to gas-liquid separation processing, obtain the tail gas through discharging, and liquid, this liquid contains selenium, thereby this liquid can be back to selenium reduction reaction still and process, thus, can reduce Se content in the flue gas of discharge, improve the organic efficiency of selenium simultaneously.In addition, according to one embodiment of present invention, before emission, can also carry out conventional treatment to tail gas, for example, by exhaust gas processing device is set, this exhaust gas processing device is connected with gas-liquid separation device, from this gas-liquid separation device, receives flue gas and processes.Thus, can improve the degree of purification of institute's emission.According to embodiments of the invention, the type of gas-liquid separation device and flue gas processing device is not particularly limited, and can be known devices conventional in any this area, and those skilled in the art can, according to actual conditions, suitably select.
For convenient, understand, the method for utilizing above-mentioned fume treatment auxiliary to carry out flue gas processing is described below.
According to another aspect of the present invention, also provide a kind of method of utilizing fume treatment auxiliary to carry out flue gas processing.According to embodiments of the invention, a kind of method of using aforementioned fume treatment auxiliary to carry out flue gas processing is provided, described flue gas contains selenium dioxide.
With reference to figure 5-6, according to embodiments of the invention, flue gas processing method comprises the following steps:
Described flue gas is supplied to described cooling device, described flue gas is carried out cooling, obtain through overcooled flue gas.Typically, the temperature of the flue gas that the flue gas that metallurgical industry produces, especially converting process produce is higher, is generally about 400-500 degree Celsius, for example 450 degrees Celsius.After cooling processing, flue-gas temperature is down to 65-75 degree Celsius, for example 70 degrees Celsius.Thus, can be so that the carrying out of follow-up processing.Inventor finds, the temperature of flue gas is down to 70 degrees Celsius, will obviously improve the efficiency of follow-up reduction reaction.According to embodiments of the invention, can be not particularly limited for being applied to the type of flue gas of the present invention, as long as wherein contain selenium dioxide.According to embodiments of the invention, the type of the cooling device that can adopt is not particularly limited, as long as can realize cooling to flue gas.According to one embodiment of present invention, adopt spray cooler, thus, can realize the effective cooling to flue gas, and can reduce costs.Particularly, can adopt compressed air cylinder, tank to be connected with spray cooler, in spray cooler, form water smoke, thus, can realize cooling to flue gas, and can tentatively wash flue gas.The concrete example according to the present invention, can be arranged on tank the top of spray cooler, to utilize gravity to realize, supplies water in cooling device, thus, can save power.
Next, will be supplied to dewater unit through overcooled flue gas, to described, through overcooled flue gas, carry out processed, obtain the flue gas through dehydration.According to embodiments of the invention, the type of dewater unit is not particularly limited.In a concrete example of the present invention, adopt gravity dewatering apparatus.Thus, can utilize gravity dehydration, reduce power consumption, reduce production cost, improve operating efficiency.
Then, the described flue gas through dehydration is supplied to wash mill, the described flue gas through dehydration is washed, obtain the flue gas through washing.According to a concrete example of the present invention, adopt Venturi scrubber, utilize water as cleaning solution, flue gas is carried out to circulation cleaning.According to embodiments of the invention, Venturi scrubber comprises contraction section, trunnion and diffuser.Dusty gas enters after contraction section, and flow velocity increases, and entering trunnion is to reach maximum.Cleaning solution adds from contraction section or trunnion, and between gas-liquid two-phase, relative velocity is very large, drop atomization under high velocity air, and gas humidity reaches capacity, and grit is moistening by water.Between grit and drop or grit, there is fierce collision and cohesion.At diffuser, gas-liquid speed reduces, and pressure gos up, and the cohesion that the grit of take is the nuclei of condensation is accelerated, and is condensed into the dust-laden drop that diameter is larger, and then is captured in demister.Thus, can improve the efficiency of washing flue gas.According to concrete example of the present invention, Venturi scrubbing device has hydraulicdriven adjustable trunnion.Thus, can regulate as required the open degree of trunnion, can increase work efficiency, avoid waste.Can adapt to the inhomogenous smelting process of flue gas supply that the converting furnace of intermittent operation produces.
After carrying out carrying out washing treatment, obtain flue gas and cleaning solution through washing.Next, cleaning solution (contain selenium, be mainly selenous acid form) is supplied to selenium reduction reaction still, and supplies with sulfur dioxide in selenium reduction reaction still, flue gas and sulfur dioxide in selenium reduction reaction still are reacted, generate the mixture that contains selenium precipitation.Cleaning solution is supplied in selenium reduction reaction still, with the sulfur dioxide in selenium reduction reaction still, following reaction occurs:
SeO
2+H
2O＝H
2SeO
3
H
2SeO
3+2SO
2+H
2O＝Se↓+2H
2SO
4
Thus, precipitation selenium and sulfuric acid have been generated.According to embodiments of the invention, to the mode of supplying with sulfur dioxide in selenium reduction reaction still, be not particularly limited.According to examples more of the present invention, can adopt sulfur dioxide storage tank is set, described sulfur dioxide storage tank is connected with described selenium reduction reaction still, for supplying with sulfur dioxide to described selenium reduction reaction still.Thus, can control as required the quantity delivered of sulfur dioxide.Can adapt to the inhomogenous smelting process of flue gas supply that the converting furnace of intermittent operation produces.In addition, according to concrete example of the present invention, sulfur dioxide cleaning device can also be further set, described sulfur dioxide cleaning device is connected with described gas-liquid separation device, for the sulfur dioxide to remaining, absorbs.Thus, further purifying smoke, improves the quality of discharging flue gas.Can adopt absorbent for example sodium hydroxide solution the sulfur dioxide in flue gas is absorbed.Applicant finds to utilize the sodium hydroxide solution of 6 % by weight, can guarantee the absorption efficiency of sulfur dioxide.Inventor finds, the Temperature Setting in selenium reduction reaction still, within the scope of 70-80 degree Celsius, will be improved to the reaction efficiency of selenium reduction reaction significantly, and reduces industrial cost.
Finally, the described mixture that contains selenium precipitation is supplied to described equipment for separating liquid from solid, and reclaims selenium.According to embodiments of the invention, the type of the equipment for separating liquid from solid that can adopt is not particularly limited, and can adopt and revolve wet dehydrator or electrostatic precipitator as gas-liquid separation device.Thus, can improve the rate of recovery of selenium.
According to embodiments of the invention, can also separated selenium be further purified.According to example of the present invention, can adopt selenium purification devices, described selenium purification devices is connected with described equipment for separating liquid from solid, for the selenium to separated, carries out purifying.Thus, can obtain purified selenium, improve the quality of products.Concrete, described selenium purification devices is comprised of filter-pressing device, slurrying device, wash mill and filter-pressing device.Thus, by press filtration, pulp, washing and press filtration, can access the selenium through being further purified, improve product quality.
In addition, for the flue gas through washing, according to embodiments of the invention, can also further to the flue gas through washing, carry out gas-liquid separation, the liquid that obtains tail gas and contain selenium dioxide.Particularly, can be by gas-liquid separation device is set, gas-liquid separation device is connected with selenium reduction reaction still with wash mill respectively, thus, can receive the flue gas through washing from wash mill, and it is carried out to gas-liquid separation processing, obtain the tail gas through discharging, and liquid, this liquid contains selenium, thereby this liquid can be back to selenium reduction reaction still and process, thus, can reduce Se content in the flue gas of discharge, improve the organic efficiency of selenium simultaneously.In addition, according to one embodiment of present invention, before emission, can also carry out conventional treatment to tail gas, for example, by exhaust gas processing device is set, this exhaust gas processing device is connected with gas-liquid separation device, from this gas-liquid separation device, receives flue gas and processes.Thus, can improve the degree of purification of institute's emission.According to embodiments of the invention, the type of gas-liquid separation device and flue gas processing device is not particularly limited, and can be known devices conventional in any this area, and those skilled in the art can, according to actual conditions, suitably select.
In the description of this description, the description of reference term " embodiment ", " some embodiment ", " example ", " concrete example " or " some examples " etc. means to be contained at least one embodiment of the present invention or example in conjunction with specific features, structure, material or the feature of this embodiment or example description.In this manual, the schematic statement of above-mentioned term is not necessarily referred to identical embodiment or example.And the specific features of description, structure, material or feature can be with suitable mode combinations in any one or more embodiment or example.
Although illustrated and described embodiments of the invention, those having ordinary skill in the art will appreciate that: in the situation that not departing from principle of the present invention and aim, can carry out multiple variation, modification, replacement and modification to these embodiment, scope of the present invention is limited by claim and equivalent thereof.
Claims (12)
1. a fume treatment auxiliary, described flue gas contains selenium dioxide, it is characterized in that, and described fume treatment auxiliary comprises:
Cooling device, cooling for described flue gas is carried out, obtain through overcooled flue gas;
Dewater unit, described dewater unit is connected with described cooling device for dewatering through overcooled flue gas to described, obtains the flue gas through dehydration;
Wash mill, described wash mill is connected with described dewater unit for the described flue gas through dehydration is washed, and obtains flue gas and cleaning solution through washing;
Selenium reduction reaction still, described selenium reduction reaction still is connected with described wash mill, for making described cleaning solution and sulfur dioxide generation reduction reaction, generates the mixture that contains simple substance selenium; And
Equipment for separating liquid from solid, described equipment for separating liquid from solid is connected with described selenium reduction reaction still, for the described mixture that contains simple substance selenium is carried out to separation, with separation and reclaim selenium.
2. fume treatment auxiliary according to claim 1, is characterized in that, described cooling device is spray cooler.
3. fume treatment auxiliary according to claim 1, is characterized in that, described dewater unit is gravity dewatering apparatus.
4. fume treatment auxiliary according to claim 1, is characterized in that, described wash mill is Venturi scrubber.
5. fume treatment auxiliary according to claim 1, is characterized in that, further comprises sulfur dioxide storage tank, and described sulfur dioxide storage tank is connected with described selenium reduction reaction still, for supplying with sulfur dioxide to described selenium reduction reaction still.
6. fume treatment auxiliary according to claim 1, is characterized in that, further comprises sulfur dioxide cleaning device, and described sulfur dioxide cleaning device is connected with described equipment for separating liquid from solid, for the sulfur dioxide to remaining, absorbs.
7. fume treatment auxiliary according to claim 1, is characterized in that, described equipment for separating liquid from solid is for revolving wet dehydrator.
8. fume treatment auxiliary according to claim 1, is characterized in that, further comprises selenium purification devices, and described selenium purification devices is connected with described equipment for separating liquid from solid, for the selenium to separated, carries out purifying.
9. fume treatment auxiliary according to claim 1, is characterized in that, described selenium purification devices is comprised of filter-pressing device, slurrying device, wash mill and filter-pressing device.
10. fume treatment auxiliary according to claim 1, is characterized in that, described Venturi scrubber has hydraulicdriven adjustable trunnion.
11. fume treatment auxiliaries according to claim 1, it is characterized in that, further comprise gas-liquid separation device, described gas-liquid separation device is connected with described selenium reduction reaction still with described wash mill respectively, to the described flue gas through washing is carried out to gas-liquid separation, the liquid that obtains tail gas and contain selenium dioxide, and the described liquid that contains selenium dioxide is delivered to selenium reduction reaction still.
12. fume treatment auxiliaries according to claim 11, is characterized in that, further comprise exhaust gas processing device, and described vent gas treatment is connected with described gas-liquid separation device, for described tail gas is processed.
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| CN201110162741.6A CN102284236B (en) | 2011-06-16 | 2011-06-16 | Equipment for treating gas fume |
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| CN109045963B (en) * | 2018-08-08 | 2021-06-08 | 华北电力大学 | Method for removing gaseous selenium dioxide in coal-fired flue gas through oxidation-absorption |
| CN110482495B (en) * | 2019-07-08 | 2021-02-12 | 昆明理工大学 | Device and method for purifying crude selenium through oxidation-evaporation-carbothermic reduction |
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| SU816518A1 (en) * | 1979-06-04 | 1981-03-30 | Красноярский Институт Цветных Металловим. M.И.Калинина | Method of extracting selenium dioxide from gases |
| JP3263586B2 (en) * | 1995-12-26 | 2002-03-04 | 享三 須山 | Flue gas treatment system |
| US20050084437A1 (en) * | 2003-10-20 | 2005-04-21 | Enviroserve Associates, L.L.C. | Scrubbing systems and methods for coal fired combustion units |
| CN101700463A (en) * | 2008-02-19 | 2010-05-05 | 孙伟杰 | Method for desulfurating and denitrating and recovering sulfur resource in closed cycle way |
| JP4900322B2 (en) * | 2008-06-03 | 2012-03-21 | 住友金属鉱山株式会社 | Method for producing metal selenium powder |
| CN202161911U (en) * | 2011-06-16 | 2012-03-14 | 中国恩菲工程技术有限公司 | Flue gas treatment equipment |
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