CN102294168A - Method for processing flue gas - Google Patents
Method for processing flue gas Download PDFInfo
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- CN102294168A CN102294168A CN201110162744XA CN201110162744A CN102294168A CN 102294168 A CN102294168 A CN 102294168A CN 201110162744X A CN201110162744X A CN 201110162744XA CN 201110162744 A CN201110162744 A CN 201110162744A CN 102294168 A CN102294168 A CN 102294168A
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Abstract
The invention provides equipment for processing flue gas, the flue gas contains selenium dioxide, the flue gas processing equipment comprises: a cooling device used for cooling the flue gas to obtain the refrigerated flue gas; a dehydrated apparatus which is connected with the cooling device is used for dehydrating the refrigerated flue gas to obtain the dehydrated flue gas; a washing apparatus which is connected with the dehydrated apparatus is used for washing the dehydrated flue gas to obtain the washed flue gas and washing liquid; a selenium reduction reaction kettle which is connected with the washing apparatus is used for carrying out a reduction reaction of the washing liquid and sulfur dioxide to generate a mixture containing simple substance selenium; and a solid-liquid separator which is connected with the selenium reduction reaction kettle is used for separating the mixture containing simple substance selenium to separate and recovery selenium. The equipment is capable of effectively recovering the selenium in flue gas.
Description
Technical field
The present invention relates to field of metallurgy.Concrete, relate to fume treatment auxiliary, and the method for using this device processes flue gas.
Background technology
The discussion of following background technology does not also mean that or does not admit that following any method or equipment are the part of prior art or general knowledge as well known to those skilled in the art.
In field of metallurgy, especially in the converting process process, can produce a large amount of flue gases usually, country is to the environmental protection requirement increasingly stringent, thereby flue gas needed to carry out purified treatment before discharging.Yet, still do not have effective treatment facility and method for the flue gas that contains selenium dioxide at present.
Summary of the invention
The present invention is intended to solve at least one of technical problem that exists in the prior art.For this reason, one object of the present invention is to propose a kind of method that can effectively handle the flue gas that contains selenium dioxide.
According to embodiments of the invention, provide a kind of fume treatment auxiliary that uses to carry out the method that flue gas is handled, described flue gas contains selenium dioxide, it is characterized in that, described fume treatment auxiliary comprises: cooling device, be used for described flue gas is cooled off, and obtain flue gas through supercooling; Dewater unit, described dewater unit link to each other with described cooling device and are used for described flue gas through supercooling is dewatered, and obtain the flue gas through dehydration; Wash mill, described wash mill link to each other with described dewater unit and are used for described flue gas through dehydration is washed, and obtain the flue gas through washing; Selenium reduction reaction still, described selenium reduction reaction still links to each other with described wash mill, is used to make the liquid and the sulfur dioxide generation reduction reaction of described washing flue gas, generates the mixture that contains the selenium precipitation; And equipment for separating liquid from solid, described equipment for separating liquid from solid links to each other with described selenium reduction reaction still, is used for the described mixture that contains the selenium precipitation is separated, to reclaim selenium; Described method comprises: described flue gas is supplied to described cooling device, described flue gas is cooled off, obtain the flue gas through supercooling; Described flue gas through supercooling is supplied to described dewater unit, described flue gas through supercooling is carried out processed, obtain flue gas through dehydration; Described flue gas through dehydration is supplied to wash mill, described flue gas through dehydration is washed, obtain flue gas through washing; Described liquid through the washing flue gas is supplied to selenium reduction reaction still, and in described selenium reduction reaction still, supplies with sulfur dioxide, make that flue gas and the sulfur dioxide in described selenium reduction reaction still reacts, generate the mixture that contains the selenium precipitation; The described mixture that contains the selenium precipitation is supplied to described equipment for separating liquid from solid, and reclaims selenium.
According to embodiments of the invention, the method for using fume treatment auxiliary to carry out the flue gas processing can also have following additional technical feature:
According to one embodiment of present invention, described cooling device is a spray cooler.Thus, can realize effective cooling, dedusting to flue gas.
According to one embodiment of present invention, described dewater unit is the gravity dehydrator.Thus, can utilize gravity dehydration, reduce power consumption.
According to one embodiment of present invention, described wash mill is a Venturi scrubber.Thus, can improve the efficient of washing flue gas.
According to one embodiment of present invention, further comprise the sulfur dioxide storage tank, described sulfur dioxide storage tank links to each other with described selenium reduction reaction still, is used for supplying with sulfur dioxide to described selenium reduction reaction still.Thus, can control the quantity delivered of sulfur dioxide as required.
According to one embodiment of present invention, further comprise the sulfur dioxide cleaning device, described sulfur dioxide cleaning device links to each other with described gas-liquid separation device, is used for the sulfur dioxide of remnants is absorbed.Thus, can further purify flue gas, improve the quality of discharging flue gas.
According to one embodiment of present invention, described gas-liquid separation device 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 the selenium purification devices, described selenium purification devices links to each other with described equipment for separating liquid from solid, is used for the selenium of described separation is carried out purifying.Thus, can obtain purified selenium, improve the quality of products.
According to one embodiment of present invention, described selenium purification devices is made up of filter-pressing device, pulp device, wash mill and filter-pressing device, selenium to described separation carries out purifying, comprises that the selenium to described separation carries out press filtration, pulp, washing and press filtration successively, obtains purified selenium.Thus,, can access selenium, improve product quality through being further purified by press filtration, pulp, washing and press filtration.
According to one embodiment of present invention, described Venturi scrubbing device has hydraulicdriven adjustable trunnion, so that regulate the open degree of trunnion according to the amount of flue gas.Thus, can increase work efficiency, avoid waste.
According to one embodiment of present invention, further comprise described flue gas through washing is carried out gas-liquid separation, obtain tail gas and the liquid that contains selenium dioxide, and the described liquid that contains selenium dioxide is delivered to selenium reduction reaction still.Thus, can reduce Se content in the discharged flue gas, improve the organic efficiency of selenium simultaneously.
According to one embodiment of present invention, it is characterized in that, further comprise the step that described tail gas is handled.Thus, can improve the degree of purification of the tail gas that discharges.
Additional aspect of the present invention and advantage part in the following description provide, and part will become obviously from the following description, or recognize by practice of the present invention.
Description of drawings
Above-mentioned and/or additional aspect of the present invention and advantage are from obviously and easily understanding becoming the description of embodiment in conjunction with following accompanying drawing, wherein:
Fig. 1 is the schematic diagram according to the equipment that is used for smoke treatment of the embodiment of the invention;
Fig. 2 is the schematic diagram that is used for the equipment of smoke treatment according to another embodiment of the present invention;
Fig. 3 is the schematic diagram according to the equipment that is used for smoke treatment of further embodiment of this invention;
Fig. 4 is the schematic diagram according to the equipment that is used for smoke treatment of further embodiment of this invention;
Fig. 5 is the schematic flow sheet according to the method for the smoke treatment of the embodiment of the invention; And
Fig. 6 is the schematic flow sheet according to 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 identical from start to finish or similar label is represented identical or similar elements or the element with identical or similar functions.Below by the embodiment that is described with reference to the drawings is exemplary, only is used to explain the present invention, and can not be interpreted as limitation of the present invention.
In description of the invention, term " vertically ", " laterally ", " on ", close the orientation of indications such as D score, " preceding ", " back ", " left side ", " right side ", " vertically ", " level ", " top ", " end " or position is based on orientation shown in the drawings or position relation, only be the present invention for convenience of description rather than require the present invention therefore can not be interpreted as limitation of the present invention with specific orientation structure and operation.The term that uses among the present invention " links to each other ", " connection " should do broad understanding, for example, can be fixedly connected, also can be to removably connect; Can be directly to link to each other, also can link to each other indirectly, for the ordinary skill in the art, can understand the concrete implication of above-mentioned term as the case may be by intermediary.
Understand for convenience, at first the equipment that the flue gas that contains selenium dioxide is handled is described.
In one aspect of the invention, provide a kind of equipment that is used to handle the flue gas that contains selenium dioxide.With reference to figure 1-4, according to one embodiment of present invention, according to the flow process that flue gas is handled, 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 from the flue gas that contains selenium dioxide, reclaim selenium effectively, realize purifying the effect of flue gas.
Supply in the cooling device by the flue gas that will contain selenium dioxide, described flue gas is cooled off, obtain flue gas through supercooling.According to embodiments of the invention, the type that can be used to be applied to flue gas of the present invention is not particularly limited, 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 the cooling to flue gas.According to one embodiment of present invention, adopt spray cooler, thus, can realize effective cooling, and can reduce cost flue gas.Particularly, can adopt compressed air cylinder, tank to link to each other, in spray cooler, form water smoke, thus, can realize cooling, and can tentatively wash flue gas to flue gas with spray cooler.The concrete example according to the present invention can be arranged on tank the top of spray cooler, so that utilize gravity to realize supplying water in the cooling device, thus, can guarantee the safe operation of flue gas purification system.
According to embodiments of the invention, the dewater unit flue gas that is used for through supercooling that links to each other with described cooling device dewaters, and 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 the gravity dehydration device.Thus, can utilize gravity dehydration, reduce power consumption, reduce production cost, improve operating efficiency.
According to embodiments of the invention, wash mill links to each other with dewater unit and is used for obtaining the flue gas through washing to washing through the flue gas that dewaters.The mode that flue gas is washed is not particularly limited, and can adopt water that flue gas is washed.According to a concrete example of the present invention, adopt Venturi scrubber, utilize water as cleaning solution, flue gas is carried out circulation cleaning.According to embodiments of the invention, Venturi scrubber comprises contraction section, trunnion and diffuser.After dusty gas entered contraction section, flow velocity increased, and entering trunnion is to reach maximum.Cleaning solution adds from contraction section or trunnion, and relative velocity is very big between gas-liquid two-phase, and drop atomizes under high velocity air, and gas humidity reaches capacity, and grit is moistening by water.Fierce collision and cohesion take place between grit and drop or the grit.At diffuser, gas-liquid speed reduces, and pressure gos up, and is that the cohesion of the nuclei of condensation is accelerated with the grit, is condensed into the bigger dust-laden drop of diameter, and then is captured in demister.Thus, can improve the efficient of washing flue gas.According to concrete example of the present invention, the Venturi scrubbing device has hydraulicdriven adjustable trunnion.Thus, can regulate the open degree of trunnion as required, can increase work efficiency, avoid waste.The inhomogenous smelting process of flue gas supply that converting furnace produced that can adapt to intermittent operation.
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 links to each other with described wash mill, is used to make cleaning solution (containing the selenium that is mainly the selenous acid form) and sulfur dioxide generation reduction reaction, generates the mixture that contains the selenium precipitation.Cleaning solution is supplied in the selenium reduction reaction still, following reaction takes place with sulfur dioxide in the selenium reduction reaction still:
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, the mode of supplying with sulfur dioxide in selenium reduction reaction still is not particularly limited.According to examples more of the present invention, can adopt the sulfur dioxide storage tank is set, described sulfur dioxide storage tank links to each other with described selenium reduction reaction still, is used for supplying with sulfur dioxide to described selenium reduction reaction still.Thus, can control the quantity delivered of sulfur dioxide as required.The inhomogenous smelting process of flue gas supply that converting furnace produced that can adapt to intermittent operation.In addition, according to concrete example of the present invention, the sulfur dioxide cleaning device can also be set further, described sulfur dioxide cleaning device links to each other with described gas-liquid separation device, is used for the sulfur dioxide of remnants is absorbed.Thus, can further purify flue gas, improve the quality of discharging flue gas.Can adopt absorbent for example sodium hydroxide solution sulfur in smoke is absorbed.The applicant finds to utilize the sodium hydroxide solution of 6 weight %, can guarantee the absorption efficiency of sulfur dioxide.
According to embodiments of the invention, equipment for separating liquid from solid links to each other with selenium reduction reaction still, is used for the described mixture that contains the selenium precipitation is separated, 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 to revolve wet dehydrator, electrostatic precipitator.Thus, can improve the rate of recovery of selenium.According to embodiments of the invention, can also the selenium that be separated be further purified.According to example of the present invention, can adopt the selenium purification devices, described selenium purification devices links to each other with described equipment for separating liquid from solid, is used for the selenium that separates is carried out purifying.Thus, can obtain purified selenium, improve the quality of products.Concrete, described selenium purification devices is made up of filter-pressing device, pulp device, wash mill and filter-pressing device.Thus,, can access selenium, improve product quality through being further purified by press filtration, pulp, washing and press filtration.
According to embodiments of the invention, can further include gas-liquid separation device, gas-liquid separation device links to each other with selenium reduction reaction still with wash mill respectively, thus, can receive flue gas from wash mill, and it be carried out gas-liquid separation handle, obtain through can discharge tail gas through washing, and liquid, this liquid contains selenium, thereby this liquid can be back to selenium reduction reaction still and handle, thus, can reduce Se content in the discharged flue gas, improve the organic efficiency of selenium simultaneously.In addition, according to one embodiment of present invention, before discharging tail gas, can also carry out conventional treatment to tail gas, for example by exhaust gas processing device is set, this exhaust gas processing device links to each other with gas-liquid separation device, receives flue gas and handles from this gas-liquid separation device.Thus, can improve the degree of purification of the tail gas that discharges.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 commonly used in any this area, and those skilled in the art can suitably select according to actual conditions.
Understand for convenience, describe below and utilize above-mentioned fume treatment auxiliary to carry out the method that flue gas is handled.
According to another aspect of the present invention, also provide a kind of fume treatment auxiliary that utilizes to carry out the method that flue gas is handled.According to embodiments of the invention, provide a kind of and used aforementioned fume treatment auxiliary to carry out the method that flue gas is handled, described flue gas contains selenium dioxide.
With reference to figure 5-6, according to embodiments of the invention, flue gas processing method may further comprise the steps:
Described flue gas is supplied to described cooling device, described flue gas is cooled off, obtain flue gas through supercooling.Usually, the flue gas that metallurgical industry produced, especially the temperature of the flue gas that converting process produced is higher, is generally about 400-500 degree centigrade, for example 450 degrees centigrade.Through after the cooling processing, flue-gas temperature is reduced to 65-75 degree centigrade, for example 70 degrees centigrade.Thus, can be so that the carrying out of follow-up processing.The inventor finds, the temperature of flue gas is reduced to 70 degrees centigrade, will obviously improve the efficient of follow-up reduction reaction.According to embodiments of the invention, the type that can be used to be applied to flue gas of the present invention is not particularly limited, 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 the cooling to flue gas.According to one embodiment of present invention, adopt spray cooler, thus, can realize effective cooling, and can reduce cost flue gas.Particularly, can adopt compressed air cylinder, tank to link to each other, in spray cooler, form water smoke, thus, can realize cooling, and can tentatively wash flue gas to flue gas with spray cooler.The concrete example according to the present invention can be arranged on tank the top of spray cooler, so that utilize gravity to realize supplying water in the cooling device, thus, can save power.
Next, will supply to dewater unit, described flue gas through supercooling will be carried out processed, obtain flue gas through dehydration through the flue gas of supercooling.According to embodiments of the invention, the type of dewater unit is not particularly limited.In a concrete example of the present invention, adopt the gravity dehydration device.Thus, can utilize gravity dehydration, reduce power consumption, reduce production cost, improve operating efficiency.
Then, described flue gas through dehydration is supplied to wash mill, described flue gas through dehydration is washed, obtain 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 circulation cleaning.According to embodiments of the invention, Venturi scrubber comprises contraction section, trunnion and diffuser.After dusty gas entered contraction section, flow velocity increased, and entering trunnion is to reach maximum.Cleaning solution adds from contraction section or trunnion, and relative velocity is very big between gas-liquid two-phase, and drop atomizes under high velocity air, and gas humidity reaches capacity, and grit is moistening by water.Fierce collision and cohesion take place between grit and drop or the grit.At diffuser, gas-liquid speed reduces, and pressure gos up, and is that the cohesion of the nuclei of condensation is accelerated with the grit, is condensed into the bigger dust-laden drop of diameter, and then is captured in demister.Thus, can improve the efficient of washing flue gas.According to concrete example of the present invention, the Venturi scrubbing device has hydraulicdriven adjustable trunnion.Thus, can regulate the open degree of trunnion as required, can increase work efficiency, avoid waste.The inhomogenous smelting process of flue gas supply that converting furnace produced that can adapt to intermittent operation.
After carrying out carrying out washing treatment, obtain flue gas and cleaning solution through washing.Next, cleaning solution (contain selenium, mainly be the selenous acid form) is supplied to selenium reduction reaction still, and in selenium reduction reaction still, supplies with sulfur dioxide, make flue gas and sulfur dioxide in selenium reduction reaction still react, generate the mixture that contains the selenium precipitation.Cleaning solution is supplied in the selenium reduction reaction still, following reaction takes place with sulfur dioxide in the selenium reduction reaction still:
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, the mode of supplying with sulfur dioxide in selenium reduction reaction still is not particularly limited.According to examples more of the present invention, can adopt the sulfur dioxide storage tank is set, described sulfur dioxide storage tank links to each other with described selenium reduction reaction still, is used for supplying with sulfur dioxide to described selenium reduction reaction still.Thus, can control the quantity delivered of sulfur dioxide as required.The inhomogenous smelting process of flue gas supply that converting furnace produced that can adapt to intermittent operation.In addition, according to concrete example of the present invention, the sulfur dioxide cleaning device can also be set further, described sulfur dioxide cleaning device links to each other with described gas-liquid separation device, is used for the sulfur dioxide of remnants is absorbed.Thus, can further purify flue gas, improve the quality of discharging flue gas.Can adopt absorbent for example sodium hydroxide solution sulfur in smoke is absorbed.The applicant finds to utilize the sodium hydroxide solution of 6 weight %, can guarantee the absorption efficiency of sulfur dioxide.The inventor finds, the temperature in the selenium reduction reaction still is set in the 70-80 degree centigrade of scope, will improve the reaction efficiency of selenium reduction reaction significantly, and reduces industrial cost.
At last, the described mixture that contains the 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 to 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 the selenium that be separated be further purified.According to example of the present invention, can adopt the selenium purification devices, described selenium purification devices links to each other with described equipment for separating liquid from solid, is used for the selenium that separates is carried out purifying.Thus, can obtain purified selenium, improve the quality of products.Concrete, described selenium purification devices is made up of filter-pressing device, pulp device, wash mill and filter-pressing device.Thus,, can access selenium, improve product quality through being further purified by press filtration, pulp, washing and press filtration.
In addition,,, can also further carry out gas-liquid separation, obtain tail gas and the liquid that contains selenium dioxide flue gas through washing according to embodiments of the invention at flue gas through washing.Particularly, can be by gas-liquid separation device be set, gas-liquid separation device links to each other with selenium reduction reaction still with wash mill respectively, thus, can receive flue gas from wash mill, and it be carried out gas-liquid separation handle, obtain through can discharge tail gas through washing, and liquid, this liquid contains selenium, thereby this liquid can be back to selenium reduction reaction still and handle, thus, can reduce Se content in the discharged flue gas, improve the organic efficiency of selenium simultaneously.In addition, according to one embodiment of present invention, before discharging tail gas, can also carry out conventional treatment to tail gas, for example by exhaust gas processing device is set, this exhaust gas processing device links to each other with gas-liquid separation device, receives flue gas and handles from this gas-liquid separation device.Thus, can improve the degree of purification of the tail gas that discharges.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 commonly used in any this area, and those skilled in the art can suitably select according to actual conditions.
In the description of this specification, concrete feature, structure, material or characteristics that the description of reference term " embodiment ", " some embodiment ", " example ", " concrete example " or " some examples " etc. means in conjunction with this embodiment or example description are contained at least one embodiment of the present invention or the example.In this manual, the schematic statement to above-mentioned term not necessarily refers to identical embodiment or example.And concrete feature, structure, material or the characteristics of description can be with the suitable manner combination 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: can carry out multiple variation, modification, replacement and modification to these embodiment under the situation that does not break away from principle of the present invention and aim, scope of the present invention is limited by claim and equivalent thereof.
Claims (12)
1. one kind is used fume treatment auxiliary to carry out the method that flue gas is handled, and described flue gas contains selenium dioxide, it is characterized in that, described fume treatment auxiliary comprises:
Cooling device is used for described flue gas is cooled off, and obtains the flue gas through supercooling;
Dewater unit, described dewater unit link to each other with described cooling device and are used for described flue gas through supercooling is dewatered, and obtain the flue gas through dehydration;
Wash mill, described wash mill link to each other with described dewater unit and are used for described flue gas through dehydration is washed, and obtain the flue gas through washing;
Selenium reduction reaction still, described selenium reduction reaction still links to each other with described wash mill, is used to make the liquid and the sulfur dioxide generation reduction reaction of described washing flue gas, generates the mixture that contains the selenium precipitation; And
Equipment for separating liquid from solid, described equipment for separating liquid from solid links to each other with described selenium reduction reaction still, is used for the described mixture that contains the selenium precipitation is separated, to reclaim selenium;
Described method comprises:
Described flue gas is supplied to described cooling device, described flue gas is cooled off, obtain flue gas through supercooling;
Described flue gas through supercooling is supplied to described dewater unit, described flue gas through supercooling is carried out processed, obtain flue gas through dehydration;
Described flue gas through dehydration is supplied to wash mill, described flue gas through dehydration is washed, obtain flue gas and cleaning solution through washing;
Described cleaning solution is supplied to selenium reduction reaction still, and in described selenium reduction reaction still, supplies with sulfur dioxide, make that liquid and the sulfur dioxide in described selenium reduction reaction still reacts, generate the mixture that contains the selenium precipitation; And
The described mixture that contains the selenium precipitation is supplied to described equipment for separating liquid from solid, to separate and recovery selenium.
2. use fume treatment auxiliary according to claim 1 carries out the method that flue gas is handled, and it is characterized in that described cooling device is a spray cooler.
3. use fume treatment auxiliary according to claim 1 carries out the method that flue gas is handled, and it is characterized in that described dewater unit is the gravity dehydrator.
4. use fume treatment auxiliary according to claim 1 carries out the method that flue gas is handled, and it is characterized in that described wash mill is a Venturi scrubber.
5. use fume treatment auxiliary according to claim 1 carries out the method that flue gas is handled, it is characterized in that, further comprise the sulfur dioxide storage tank, described sulfur dioxide storage tank links to each other with described selenium reduction reaction still, is used for supplying with sulfur dioxide to described selenium reduction reaction still.
6. use fume treatment auxiliary according to claim 1 carries out the method that flue gas is handled, it is characterized in that, further comprise the sulfur dioxide cleaning device, described sulfur dioxide cleaning device links to each other with described gas-liquid separation device, is used for the sulfur dioxide of remnants is absorbed.
7. use fume treatment auxiliary according to claim 1 carries out the method that flue gas is handled, and it is characterized in that, described equipment for separating liquid from solid is for revolving wet dehydrator or electrostatic precipitator.
8. use fume treatment auxiliary according to claim 1 carries out the method that flue gas is handled, and it is characterized in that further comprise the selenium purification devices, described selenium purification devices links to each other with described gas-liquid separation device, is used for the selenium of described separation is carried out purifying.
9. use fume treatment auxiliary according to claim 1 carries out the method that flue gas is handled, it is characterized in that, described selenium purification devices is made up of filter-pressing device, pulp device, wash mill and filter-pressing device, described selenium to described separation carries out purifying, comprise that the selenium to described separation carries out press filtration, pulp, washing and press filtration successively, obtains purified selenium.
10. use fume treatment auxiliary according to claim 1 carries out the method that flue gas is handled, and it is characterized in that described Venturi scrubbing device has hydraulicdriven adjustable trunnion, so that regulate the open degree of trunnion according to the amount of flue gas.
11. use fume treatment auxiliary according to claim 1 carries out the method that flue gas is handled, it is characterized in that, further comprise described flue gas through washing is carried out gas-liquid separation, obtain tail gas and the liquid that contains selenium dioxide, and the described liquid that contains selenium dioxide is delivered to selenium reduction reaction still.
12. use fume treatment auxiliary according to claim 11 carries out the method that flue gas is handled, and it is characterized in that, further comprises the step that described tail gas is handled.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102974188A (en) * | 2012-12-11 | 2013-03-20 | 中国瑞林工程技术有限公司 | Device and method for processing high temperature selenium-containing flue gas |
| CN104053489A (en) * | 2012-02-06 | 2014-09-17 | 纳尔科公司 | Corrosion control in and selenium removal from flue gas wet scrubber systems |
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| CN107475522A (en) * | 2017-08-30 | 2017-12-15 | 阳谷祥光铜业有限公司 | A kind of method for reclaiming copper, selenium and lead in the relieving haperacidity process from copper blast furnace off-gas in caused high-copper selenium waste material |
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