CN105727691A - Tail gas treating method - Google Patents
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- CN105727691A CN105727691A CN201410748983.7A CN201410748983A CN105727691A CN 105727691 A CN105727691 A CN 105727691A CN 201410748983 A CN201410748983 A CN 201410748983A CN 105727691 A CN105727691 A CN 105727691A
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Abstract
The present invention discloses a tail gas treating method. The treating method is conducted in a tail gas treating device. The device comprises a purification tower, a turbulent ball tower and a washing liquid storage tank. First spraying devices are arranged within the purification tower; tail gas absorption zones and air flow inlet zones where second spraying devices and second filling layers are alternately arranged are formed within the turbulent ball tower successively from top to bottom. The tail gas is subjected to a first contact with a first washing solution in the purification tower, and the air flow after the first contact is subjected to a second contact with a second washing solution in the turbulent ball tower. A first waste washing liquid after the first contact and a second waste washing liquid after the second contact are mixed into a mixed liquid in the washing liquid storage tank, and the mixed liquid can be recycled to be used again as the first washing solution and the second washing solution. The method can enable the pollutant content which cannot initially meet the emission standards to be reduced to the emission standards or below, further reduces the pollutant content which can initially meet the standards, and is more conductive for environmental protection.
Description
Technical field
The present invention relates to the processing method of a kind of tail gas, in particular it relates to the processing method of a kind of plastic tail gas.
Background technology
In catalytic cracking catalyst (FCC catalyst) plastic process, it is necessary to use the raw materials such as dry aluminum stone, Kaolin, hydrochloric acid and Alumina gel.Wherein dry aluminum stone is pulverulent solids, and Kaolin is blocks of solid, when solid raw material feeds intake and especially throws dry aluminum stone, can produce substantial amounts of dust, and hydrochloric acid is volatile, therefore possibly together with partial corrosion hydrogen chloride gas in plastic tail gas.If the directly discharge of plastic tail gas can be caused serious atmospheric pollution.
Summary of the invention
Based on the feature of above plastic tail gas, it is an object of the invention to provide the processing method of a kind of tail gas, this exhaust gas treating method can remove the dust in plastic tail gas and corrosive gas HCL effectively, enables the tail gas of final discharge to reach discharge standard.
To achieve these goals, the invention provides the processing method of a kind of tail gas, wherein, this processing method carries out in tail gas treatment device, and this equipment includes: purifying column, tubulent contact tower and cleaning mixture storage tank, wherein, is provided with one-level injection apparatus in described purifying column；It is disposed with two-stage injection device in described tubulent contact tower from top to bottom and tail gas adsorption district and air-flow that two grades of packing layers are alternately arranged enter district；
Wherein, described tail gas carries out first with the first cleaning mixture in purifying column and contacts, and the gas stream after the first contact carries out second with the second cleaning mixture in tubulent contact tower and contacts；Wherein, after the first useless cleaning mixture and second after the first contact contacts, the second useless cleaning mixture is mixed into mixed liquor in cleaning mixture storage tank, and circulates again as the first cleaning mixture and the second cleaning mixture.
Preferably, the filler in described one-level packing layer is corrugated plate packing.
Preferably, described one-level injection apparatus is provided with spiral nozzle.
Preferably, the filler in described two grades of packing layers is filling ball.
Preferably, described two-stage injection device is provided with pressure nozzle.
Preferably, described first cleaning mixture and the second cleaning mixture are the acid solution of pH value 1.5-4.
Pass through technique scheme, under the effect of air-introduced machine, plastic tail gas enters in the purifying column being provided with one-level packing layer via air channel and carries out pre-dedusting, and part dust and hydrogen chloride gas are captured, and remaining dust and hydrogen chloride gas enter tubulent contact tower with air-flow and be further processed.In the preferred case, in one-level packing layer, filler is set to corrugated plate packing, filler in two grades of packing layers is set to filling ball, nozzle on one-level injection apparatus is set to spiral nozzle, nozzle on two-stage injection device is set to pressure nozzle, it is possible to further enhance tail gas treatment effect in the apparatus.Plastic tail gas is processed by the method using invention, and the dust content in the final neat stress discharged can be down to 30mg/m3Hereinafter, having reached discharge standard, the content of hydrogen chloride gas can be down to 5mg/m3Hereinafter, when original reached discharge standard reduce further its content, thus being more beneficial for environmental protection, temperature can be reduced to less than 35 DEG C, effectively its waste heat has been reclaimed.
Other features and advantages of the present invention will be described in detail in detailed description of the invention part subsequently.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and constitutes the part of description, is used for explaining the present invention, but is not intended that limitation of the present invention together with detailed description below.In the accompanying drawings:
Fig. 1 is the equipment for processing plastic tail gas of a kind of detailed description of the invention of the present invention.
Description of reference numerals
1 purifying column 2 tubulent contact tower 3 cleaning mixture storage tank
11 one-level packing layer 12 one-level injection apparatus
21 2 grades of packing layer 22 two-stage injection devices
Detailed description of the invention
Below with reference to accompanying drawing, the specific embodiment of the present invention is described in detail.It should be appreciated that detailed description of the invention described herein is merely to illustrate and explains the present invention, it is not limited to the present invention.
In the present invention, when not making contrary explanation, the noun of locality of use each means in the vertical direction such as " upper and lower ", level height defined, what level height was higher be referred to as " on ", what level height was relatively low is referred to as D score.
As it is shown in figure 1, the invention provides the processing method of a kind of tail gas, wherein, this processing method carries out in tail gas treatment device, and this equipment includes: purifying column 1, tubulent contact tower 2 and cleaning mixture storage tank 3, wherein, is provided with one-level injection apparatus 12 in described purifying column 1；It is disposed with two-stage injection device 22 in described tubulent contact tower 2 from top to bottom and tail gas adsorption district and air-flow that two grades of packing layers 21 are alternately arranged enter district；
Wherein, described tail gas carries out first with the first cleaning mixture in purifying column 1 and contacts, and the gas stream after the first contact carries out second with the second cleaning mixture in tubulent contact tower 2 and contacts；Wherein, after the first useless cleaning mixture and second after the first contact contacts, the second useless cleaning mixture is mixed into mixed liquor in cleaning mixture storage tank 3, and circulates again as the first cleaning mixture and the second cleaning mixture.
In preferred situation, in described purifying column 1, it is additionally provided with the one-level packing layer 11 being positioned at one-level injection apparatus 12 bottom.The setting of described one-level packing layer 11 enables to tail gas and more substantially effectively contacts with the first cleaning mixture from one-level injection apparatus 12 in purifying column 1, thus the dust in tail gas and hydrogen chloride gas are removed effectively, reduce the processing pressure of follow-up tubulent contact tower 2.Filler in described one-level packing layer 11 can be one or more fillers commonly used in the art, it is further preferable that the filler in described one-level packing layer 11 is corrugated plate packing.The material of described corrugated plate packing can be various materials commonly used in the art, and the present invention does not repeat them here.
According to the present invention, multiple one-level injection apparatus 12 for spraying the first cleaning mixture it is provided with in described purifying column 1, when tail gas enters wherein from the gas inlet at described purifying column 1 top, contact with the first cleaning mixture of described one-level injection apparatus 12 injection, so that the waste heat of tail gas and dust and hydrogen chloride gas are absorbed, thus completing the pretreatment to it.Wherein, being provided with multiple nozzle for spraying the first cleaning mixture on the one-level injection apparatus 12 of described purifying column 1, the shape of described nozzle can be the shape of nozzle commonly used in the art, for instance but be not limited to, with the nozzle of radian, spiral nozzle, pressure nozzle etc..And consider and tail gas caught dirt effect and output, the preferred described nozzle of the present invention is spiral nozzle.It addition, according to the present invention, described one-level injection apparatus 12 is also provided with the valve of the first spraying cleaning solution amount that regulates, so that the first cleaning mixture can contact with tail gas according to scheduled volume.Wherein, carry out with tail gas first contact after the first useless cleaning mixture collect in, by flowing automatically, the cleaning mixture storage area being positioned at described one-level packing layer 11 bottom in described purifying column 1.
According to the present invention, in order to ensure spraying effect and the assimilation effect to tail gas, described one-level injection apparatus 12 could be arranged to multilamellar, it is preferred to 1-3 layer.
According to the present invention, the height of described one-level packing layer 11 can select in wider scope, as long as making the temperature of tail gas after described purifying column 1 processes be reduced to less than 40 DEG C, and can effectively the dust in tail gas and hydrogen chloride gas and waste heat be absorbed.Preferably, the height of described one-level packing layer 11 is 0.05-0.2:1 with the ratio of the total height of described purifying column 1.
According to the present invention, generally, the temperature of the tail gas entering purifying column can in the scope of 50-100 DEG C.It addition, the temperature of described first cleaning mixture can be the temperature of the cleaning mixture of this area routine, and need to be significantly less than the temperature of the tail gas entering purifying column 1, so that the waste heat of tail gas can be effectively absorbed.As well known to those skilled in the art, after the first cleaning mixture carries out heat exchange with tail gas in equipment as above, its temperature can rise significantly, and the temperature general control of described first cleaning mixture is at 20-50 DEG C, it is preferable that in the scope of 20-35 DEG C.
According to the present invention, the condition of described first contact can select in wider scope, as long as ensureing that the temperature of the tail gas after contact is down in the scope not higher than 40 DEG C, those skilled in the art can regulate voluntarily according to practical situation.Such as, described tail gas enters the flow of purifying column 1 is 1000-4000m3/ h, relative to tail gas every liter described, the consumption of described first cleaning mixture is 0.005-0.015 liter.
In described tubulent contact tower 2, described two grades of packing layers 21 and two-stage injection device 22 are alternately arranged, and two grades of packing layers 21 in bottom, two-stage injection device 22 is on top, so that the tail gas moved upward in tubulent contact tower 2 can carry out reverse contact with the second cleaning mixture from two-stage injection device 22 in two grades of packing layers 21 such that it is able to the gas stream after contacting first better absorbs.Wherein, the gas stream after the first contact is discharged from the offgas outlet of described purifying column 1 bottom, enters in described tubulent contact tower 2, and rises to above alternate cells the waste heat of tail gas and dust and hydrogen chloride gas are absorbed further.Wherein, the air-flow that the second useless cleaning mixture after the gas stream contact after contacting with first in tubulent contact tower 2 collects in described tubulent contact tower 2 bottom by flowing automatically enters district.
Additionally, in the present invention, the quantity of described alternate cells specifically can regulate according to practical situation, such as, when in pending tail gas, the content of dust content and hydrogen chloride gas is relatively low, it is possible to be set to 1 alternate cells, when higher, could be arranged to multiple, for instance, it is possible to it is 3.
Wherein, in described alternate cells, the distance of each alternate cells height in described tubulent contact tower 2 and described two-stage injection device 22 and two grades of packing layers 21 can select in wider scope, as long as ensureing that the indices of the tail gas processed through tubulent contact tower 2 can reach discharge standard.In preferred situation, the ratio of the height of each alternate cells and the total height of described tubulent contact tower 2 is 0.1-0.4:1, and the distance of described two-stage injection device 22 and two grades of packing layers 21 is 0.2-0.6m.
According to the present invention, in described alternate cells, for the assimilation effect of the gas stream after ensureing spraying effect and contacting first, described two-stage injection device 22 could be arranged to multilamellar, it is preferred to layer 2-3.
Wherein, being provided with multiple nozzle for spraying the second cleaning mixture on the two-stage injection device 22 of described tubulent contact tower 2, the shape of described nozzle can be the shape of nozzle commonly used in the art, for instance but be not limited to, with the nozzle of radian, spiral nozzle, pressure nozzle etc..And considering the assimilation effect to tail gas, the preferred described nozzle of the present invention is pressure nozzle.It addition, according to the present invention, described two-stage injection device 22 is also provided with the valve of the second spraying cleaning solution amount that regulates, so that the second cleaning mixture can contact according to the gas stream after scheduled volume and the first contact.
In the present invention, the filler in described two grades of packing layers 21 can be one or more fillers commonly used in the art, it is further preferable that the filler in described two grades of packing layers 21 is filling ball.Wherein, the material of described filling ball can be material commonly used in the art, for instance, polypropylene plastics.
In described tubulent contact tower 2, entering the tail gas in described alternate cells, a part is used for fluidizing described filling ball, and another part then passes through filler layers of balls with the form of bubble.The drop major part formed from the second cleaning mixture of two-stage injection device 22 is used for the described filling ball of moistening fluidisation, liquid film is formed on filling ball surface, remainder the second cleaning mixture is dispersed among exhaust gas flow, form air-liquid bubbling group, when running into filling ball or drop when dust-contained airflow, air-flow can change direction, walks around filling ball or drop.The dust that some inertia are bigger keeps the original direction of motion, thus meeting with filling ball or drop, when meeting, one end of dust contacts with their surface, is captured because of adhesive attraction；Some less dusts (such as, < dust of 0.3 μm) are under the shock of gas molecule, as gas molecule, do complicated Brownian movement, in motor process, with filling ball or drop contact and be captured.Due to the comprehensive function in these three direction, the dust in air-flow is removed, and hydrogen chloride gas is highly soluble in water and water solubility rate is fast, can also effectively be absorbed after tubulent contact tower 2.
According to the present invention, the temperature of described second cleaning mixture can be the temperature of the cleaning mixture of this area routine, and needs the temperature of the gas stream after being significantly less than the first contact entering tubulent contact tower 2, can effectively absorb the waste heat of tail gas.As well known to those skilled in the art, after the second cleaning mixture carries out heat exchange with tail gas in equipment as above, its temperature can rise significantly, and the temperature general control of described second cleaning mixture is at 20-50 DEG C, it is preferable that in the scope of 20-35 DEG C.Selection for actual temp can be determined according to the temperature entering tail gas therein, and the present invention does not repeat them here.
According to the present invention, the condition of described second contact can select in wider scope, as long as ensureing that the gas stream after the second contact can reach discharge standard, those skilled in the art can regulate voluntarily according to practical situation.Such as, the gas stream after described first contact enters the flow of tubulent contact tower 2 is 1000-4000m3/ h, relative to the gas stream after the first contact every liter described, the consumption of described second cleaning mixture is 0.01-0.015 liter.
According to the present invention, after the first useless cleaning mixture after first contact of the cleaning mixture storage area of described one-level packing layer 11 bottom and described tubulent contact tower 2 lower stream of airflow enter second contact in district, the second useless cleaning mixture can pass through pipeline and be back in described cleaning mixture storage tank 3 formation mixed liquor, and the mixed liquor in cleaning mixture storage tank 3 passes through pipeloop and again supplies the first cleaning mixture or the second cleaning mixture respectively to the one-level injection apparatus 12 of described purifying column 1 and the two-stage injection device 22 of described tubulent contact tower 2.Wherein, when in cleaning mixture storage tank 3, the absorbability of cleaning mixture is poor, it is possible to supplement fresh cleaning mixture wherein, and useless cleaning mixture is discharged.The useless cleaning mixture discharged such as can enter colloid generating kettle and further utilize.
The method of the present invention is applicable to the tail gas that can discharge after various needs process, and is particularly suited for the tail gas to producing in catalyst plastic process and processes.
It addition, can be dust and hydrogen chloride gas to be had the liquid of Absorption arbitrarily according to the present invention, described first cleaning mixture and the second cleaning mixture, for instance, it is possible to for acid solution, can also be alkali liquor, it is also possible to for neutral liquid.But considering the later use rate of cleaning mixture, first cleaning mixture of the present invention and the second cleaning mixture preferably employ the acid solution of pH value 1.5-4.It is preferred, therefore, that above-mentioned supplemented fresh cleaning mixture is also the acid solution of pH value 1.5-4.
Hereinafter the tail gas produced in catalyst plastic process is described the present invention.In following example,
The dustiness of pending plastic tail gas is 114-175mg/m3, gas HCL content is 10-25mg/m3, temperature is 50 DEG C, is specifically shown in table 1；
Pending plastic tail gas processes at equipment as described in Figure 1, this equipment includes: purifying column 1, tubulent contact tower 2 and cleaning mixture storage tank 3, wherein, it is provided with one-level packing layer 11 in described purifying column 1 and is positioned at the one-level injection apparatus 12 on described one-level packing layer 11 top；It is disposed with two-stage injection device 22 in described tubulent contact tower 2 from top to bottom and tail gas adsorption district and air-flow that two grades of packing layers 21 are alternately arranged enter district；Wherein, after the purified tower 1 of described tail gas processes, entrance tubulent contact tower 2 is further processed；Described cleaning mixture storage tank 3 is for supplying water to described one-level injection apparatus 12 and two-stage injection device 22 respectively, and collects the cleaning mixture in the air-flow entrance district from purifying column 1 bottom and tubulent contact tower 2；
Wherein, the filler in described one-level packing layer 11 is corrugated plate packing, and the ratio of the height of described one-level packing layer 11 and the total height of described purifying column 1 is 0.15:1.Described one-level injection apparatus 12 is 3 spray guns, and every spray gun is provided with 2 spiral nozzles；
Wherein, the alternate cells that two grades of packing layers 21 and two-stage injection device 22 are alternately arranged is 2, is provided with 1 layer of injection apparatus in each alternate cells, and every layer of injection apparatus is 3 spray guns, and each spray gun is provided with 2 pressure nozzles.The ratio of the height of each alternate cells and the total height of described tubulent contact tower 2 is 0.3:1, and the distance of described two-stage injection device 22 and two grades of packing layers 21 is 0.4m.Filler in described one-level packing layer 21 is filling ball.
Measuring of dust content adopts particulate matter in GB/T16157-1996 Concentration in Fixed Pollutants Source to measure the method for sampling with gaseous contaminant；
The assay method of gas chlorination hydrogen content is the 4th edition (addendum) chromatography of ions of air and waste gas method for monitoring and analyzing；
The acid solution of the first cleaning mixture, the second cleaning mixture and fresh wash liquid: pH1.5-4.
Embodiment 1
The present embodiment is for illustrating the processing method of plastic tail gas provided by the invention.
Making plastic tail gas enter from the gas inlet of purifying column 1, the flow that tail gas enters is 3000m3/ h, purifying column 1 and packing layer 11 carry out first with the first cleaning mixture of the one-level injection apparatus 12 from purifying column 1 contact, wherein, the temperature of the first cleaning mixture is 30 DEG C, relative to plastic tail gas every liter described, the emitted dose of described first cleaning mixture is 0.01 liter, and the temperature of the gas stream after the first contact is reduced to 35 DEG C.
Making the gas stream after the first contact enter tubulent contact tower 2, entrance flow is 2000m3/ h, in two grades of packing layers 21, the second cleaning mixture with adsorption stuffing therein and from the two-stage injection device 22 of tubulent contact tower 2 carries out second and contacts, wherein, the temperature of the second cleaning mixture is 30 DEG C, relative to the gas stream after the first contact every liter described, the emitted dose of described second cleaning mixture is 0.015 liter, and the temperature of the gas stream after the second contact is 31 DEG C, and the tail gas after cooling is discharged from the top of tubulent contact tower 2.Measuring the dust content in the tail gas after discharging, the content of gas chlorination hydrogen, result is in Table 1.
Wherein, the first cleaning mixture after the first contact and the second cleaning mixture after the second contact are mixed into mixed liquor in cleaning mixture storage tank 3, and circulate again as the first cleaning mixture and the second cleaning mixture.When the cleaning mixture pH value in cleaning mixture storage tank 3 is not in the scope of 1.5-4, be introduced into colloid generating kettle carry out further with, and supplement fresh cleaning mixture in time.
Embodiment 2
The present embodiment is for illustrating the processing method of plastic tail gas provided by the invention.
Making plastic tail gas enter from the gas inlet of purifying column 1, the flow that tail gas enters is 2500m3/ h, purifying column 1 and packing layer 11 carry out first with the first cleaning mixture of the one-level injection apparatus 12 from purifying column 1 contact, wherein, the temperature of the first cleaning mixture is 20 DEG C, relative to plastic tail gas every liter described, the emitted dose of described first cleaning mixture is 0.01 liter, and the temperature of the gas stream after the first contact is reduced to 33 DEG C.
Making the gas stream after the first contact enter tubulent contact tower 2, entrance flow is 3000m3/ h, in two grades of packing layers 21, the second cleaning mixture with adsorption stuffing therein and from the two-stage injection device 22 of tubulent contact tower 2 carries out second and contacts, wherein, the temperature of the second cleaning mixture is 20 DEG C, relative to the gas stream after the first contact every liter described, the emitted dose of described second cleaning mixture is 0.01 liter, and the temperature of the gas stream after the second contact is 28 DEG C, and the tail gas after cooling is discharged from the top of tubulent contact tower 2.Measuring the dust content in the tail gas after discharging, the content of gas chlorination hydrogen, result is in Table 1.
Wherein, the first cleaning mixture after the first contact and the second cleaning mixture after the second contact are mixed into mixed liquor in cleaning mixture storage tank 3, and circulate again as the first cleaning mixture and the second cleaning mixture.When the cleaning mixture pH value in cleaning mixture storage tank 3 is not in the scope of 1.5-4, be introduced into colloid generating kettle carry out further with, and supplement fresh cleaning mixture in time.
Embodiment 3
The present embodiment is for illustrating the processing method of plastic tail gas provided by the invention.
Making plastic tail gas enter from the gas inlet of purifying column 1, the flow that tail gas enters is 1500m3/ h, purifying column 1 and packing layer 11 carry out first with the first cleaning mixture of the one-level injection apparatus 12 from purifying column 1 contact, wherein, the temperature of the first cleaning mixture is 25 DEG C, relative to plastic tail gas every liter described, the emitted dose of described first cleaning mixture is 0.015 liter, and the temperature of the gas stream after the first contact is reduced to 30 DEG C.
Making the gas stream after the first contact enter tubulent contact tower 2, entrance flow is 1500m3/ h, in two grades of packing layers 21, the second cleaning mixture with adsorption stuffing therein and from the two-stage injection device 22 of tubulent contact tower 2 carries out second and contacts, wherein, the temperature of the second cleaning mixture is 25 DEG C, relative to the gas stream after the first contact every liter described, the emitted dose of described second cleaning mixture is 0.015 liter, and the temperature of the gas stream after the second contact is 22 DEG C, and the tail gas after cooling is discharged from the top of tubulent contact tower 2.Measuring the dust content in the tail gas after discharging, the content of gas chlorination hydrogen, result is in Table 1.
Wherein, the first cleaning mixture after the first contact and the second cleaning mixture after the second contact are mixed into mixed liquor in cleaning mixture storage tank 3, and circulate again as the first cleaning mixture and the second cleaning mixture.When the cleaning mixture pH value in cleaning mixture storage tank 3 is not in the scope of 1.5-4, be introduced into colloid generating kettle carry out further with, and supplement fresh cleaning mixture in time.
Embodiment 4
The present embodiment is for illustrating the processing method of plastic tail gas provided by the invention.
Plastic tail gas is processed by the method according to embodiment 1, wherein, the difference is that, the one-level injection apparatus 12 of purifying column 1 is provided with fan nozzle, and the two-stage injection device 22 of tubulent contact tower 2 is provided with spiral nozzle.Result is in Table 1.
Embodiment 5
The present embodiment is for illustrating the processing method of plastic tail gas provided by the invention.
Plastic tail gas is processed by the method according to embodiment 1, wherein, the difference is that, the filler in described one-level packing layer 11 is corrugated plate packing, and the filler in described two grades of packing layers 21 is corrugated plate packing.Result is in Table 1.
Embodiment 6
The present embodiment is for illustrating the processing method of plastic tail gas provided by the invention.
Plastic tail gas is processed by the method according to embodiment 1, wherein, the difference is that, described purifying column 1 is not provided with one-level packing layer 11, result is in Table 1.
Comparative example 1
This comparative example is for illustrating the processing method of existing plastic tail gas.
Plastic tail gas is processed by the method according to embodiment 1, wherein, the difference is that the alternate cells that, the tail gas adsorption district of described tubulent contact tower 2 is not two-stage injection device 22 and two grades of packing layers 21 are alternately arranged, and be arranged to two grades of packing layers 21 under, two-stage injection device 22 is upper.Result is in Table 1.
Table 1
By above example and comparative example it can be seen that use the method for the present invention that plastic tail gas is processed, it is possible to be effectively reduced the dust content discharging tail gas, it is possible to decrease to 30mg/m3Below, reach discharge standard, the content of hydrogen chloride gas, when original just up to standard got back further reduction, in previous level, its content at least can reduce by 81% again, further mitigating the pressure to environment, temperature can be reduced to less than 35 DEG C, effectively its waste heat has been reclaimed.And by the comparison of embodiment 1 and embodiment 4-6 it can be seen that by the setting of filler in the setting of specific injection apparatus and packing layer, it is possible to more effective waste heat in plastic tail gas, dust and hydrogen chloride gas are reclaimed.
The preferred embodiment of the present invention described in detail above; but, the present invention is not limited to the detail in above-mentioned embodiment, in the technology concept of the present invention; technical scheme can being carried out multiple simple variant, these simple variant belong to protection scope of the present invention.
It is further to note that each the concrete technical characteristic described in above-mentioned detailed description of the invention, in reconcilable situation, it is possible to be combined by any suitable mode.In order to avoid unnecessary repetition, various possible compound modes are no longer illustrated by the present invention separately.
Additionally, can also carry out combination in any between the various different embodiment of the present invention, as long as it is without prejudice to the thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (11)
1. the processing method of a tail gas, it is characterized in that, this processing method carries out in tail gas treatment device, this equipment includes: purifying column (1), tubulent contact tower (2) and cleaning mixture storage tank (3), wherein, it is provided with one-level injection apparatus (12) in described purifying column (1)；It is disposed with two-stage injection device (22) in described tubulent contact tower (2) from top to bottom and tail gas adsorption district and air-flow that two grades of packing layers (21) are alternately arranged enter district；
Wherein, described tail gas carries out first with the first cleaning mixture in purifying column (1) and contacts, and the gas stream after the first contact carries out second with the second cleaning mixture in tubulent contact tower (2) and contacts；Wherein, after the first useless cleaning mixture and second after the first contact contacts, the second useless cleaning mixture is mixed into mixed liquor in cleaning mixture storage tank (3), and circulates again as the first cleaning mixture and the second cleaning mixture.
2. method according to claim 1, wherein, is additionally provided with the one-level packing layer (11) being positioned at one-level injection apparatus (12) bottom in described purifying column (1).
3. method according to claim 2, wherein, the filler in described one-level packing layer (11) is corrugated plate packing.
4. method according to claim 1, wherein, described one-level injection apparatus (12) is provided with spiral nozzle.
5. the method according to any one in claim 1-4, wherein, the condition of described first contact includes: the temperature of described tail gas is 50-100 DEG C, and the temperature of described first cleaning mixture is 20-50 DEG C, and it is 1000-4000m that described tail gas enters the flow of purifying column (1)3/ h, relative to tail gas every liter described, the consumption of described first cleaning mixture is 0.005-0.015 liter.
6. method according to claim 1, wherein, each two-stage injection device (22) and the injection apparatus in two grades of packing layer (21) alternate cells are at least 1 layer.
7. method according to claim 1, wherein, described two-stage injection device (22) is provided with pressure nozzle.
8. method according to claim 1, wherein, the filler in described two grades of packing layers (21) is filling ball.
9. the method according to any one in claim 6-8, wherein, the condition of described second contact includes: the temperature of described second cleaning mixture is 20-50 DEG C, and it is 1000-4000m that the gas stream after the first contact enters the flow of tubulent contact tower (2)3/ h, relative to the gas stream after the first contact every liter described, the consumption of described second cleaning mixture is 0.01-0.015 liter.
10. the method according to any one in claim 1-9, wherein, described tail gas is plastic tail gas.
11. the method according to any one in claim 1-9, wherein, described first cleaning mixture and the second cleaning mixture are the acid solution of pH value 1.5-4；Preferably, the cleaning mixture in cleaning mixture storage tank (3) also includes the acid solution of the extra pH value 1.5-4 supplemented.
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| CN201410748983.7A CN105727691A (en) | 2014-12-09 | 2014-12-09 | Tail gas treating method |
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| CN201410748983.7A CN105727691A (en) | 2014-12-09 | 2014-12-09 | Tail gas treating method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112374461A (en) * | 2020-11-02 | 2021-02-19 | 攀枝花钢企欣宇化工有限公司 | Washing composite set of magnesium electrolysis chlorine |
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| GB2182261B (en) * | 1985-10-24 | 1989-11-15 | Saint Gobain Isover | Cleaning gas by treatment with a liquid |
| CN202398267U (en) * | 2011-12-30 | 2012-08-29 | 上海安居乐环保科技有限公司 | Novel spray-painting waste gas treating device |
| CN203123767U (en) * | 2013-04-01 | 2013-08-14 | 东莞市莞绿环保工程有限公司 | Composite type dust collector |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112374461A (en) * | 2020-11-02 | 2021-02-19 | 攀枝花钢企欣宇化工有限公司 | Washing composite set of magnesium electrolysis chlorine |
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Application publication date: 20160706 |