CN105403057B - A kind of processing method of molecular sieve baking tail gases - Google Patents
A kind of processing method of molecular sieve baking tail gases Download PDFInfo
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- CN105403057B CN105403057B CN201410458133.3A CN201410458133A CN105403057B CN 105403057 B CN105403057 B CN 105403057B CN 201410458133 A CN201410458133 A CN 201410458133A CN 105403057 B CN105403057 B CN 105403057B
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Abstract
A kind of processing method of molecular sieve baking tail gases, this method including：Carried out in the equipment of chilling tower, absorption tower and washing liquid storage tank, the injection apparatus for jet washing liquid is provided with the chilling tower；This method includes：Make the molecular sieve baking tail gases carry out first with the first cleaning solution in chilling tower to contact, first cleaning solution includes the cleaning solution of injection apparatus and washing liquid storage tank from chilling tower；The gas stream after first contacts is set to carry out second with the second cleaning solution from cleaning solution spraying zone with adsorption stuffing in the packing layer on absorption tower and contact；The second cleaning solution after the first cleaning solution and the second contact after first contact is mixed in the bottom on absorption tower, again as the first cleaning solution and/or the second cleaning solution.The present invention carries out two-way circulation using cleaning solution in equipment as above, while raising cleaning solution utilization rate, can more effectively reclaim the waste heat of molecular sieve baking tail gases, and the pollutant contained to it removal.
Description
Technical field
The present invention relates to a kind of processing method of molecular sieve baking tail gases.
Background technology
Molecular sieve is the important component and primary raw material of catalytic cracking catalyst, accounts for the component of catalyst larger proportion, its
Main function is the active component for improving catalyst.
Calcination stepses are usually required during system with molecular sieve for preparing is standby.Combustion chamber for the roaster that burns stove molecular sieve
Mean temperature is 1200 DEG C, wherein, temperature when flue gas leaves body of heater is also at 650 DEG C or so, therefore, 40% quilt of gross heat input
Flue gas is taken away.If flue gas is directly entered flue and is discharged into air, serious heat loss due to exhaust gas can be caused.And the flue gas discharged
In containing the atmosphere pollution such as substantial amounts of dust, ammonia, if directly discharge, can also cause serious pollution to air.
At present, the pollutant such as dust, ammonia in molecular sieve baking tail gases, and heat entrained by it mainly pass through chilling
The equipment such as tower and absorption tower, is absorbed using cleaning solution.
But currently used for the method administered with reuse molecular sieve baking tail gases, its waste heat can not effectively be returned
Receive, and the utilization rate of cleaning solution is relatively low, and the pollutant that can not contain to it is effectively removed.
The content of the invention
The invention aims to overcome drawbacks described above, there is provided a kind of waste heat progress that can be to molecular sieve baking tail gases
Effectively reclaim, improve the utilization rate of cleaning solution, and to method that the pollutant that it contains effectively is administered.
To achieve these goals, the invention provides a kind of processing method of molecular sieve baking tail gases, wherein, the processing
Method is carried out in molecular sieve baking tail gases processing equipment, and the equipment includes：Chilling tower, tail gas absorber and washing liquid storage tank,
The injection apparatus for jet washing liquid is provided with the chilling tower, the discharging opening of the chilling tower is communicated to the tail gas and inhaled
The air-flow for receiving tower enters area, is arranged at injection of the leakage fluid dram of tail gas absorption tower bottom by pipeline respectively with the chilling tower and fills
Put, the cleaning solution spraying zone of the tail gas absorber and the washing liquid storage tank return liquid mouthful connection, the washing liquid storage tank
Liquid outlet pass through the cleaning solution inlet communication at pipeline and the chilling tower top end；
The tail gas absorber includes housing and the packing layer being arranged in housing, and by packing layer by housing
Portion space is divided into being located at cleaning solution spraying zone more than packing layer from top to bottom and the air-flow below packing layer enters
Enter area；
Methods described includes：
Make the molecular sieve baking tail gases carry out first with the first cleaning solution in chilling tower to contact, first cleaning solution
Cleaning solution including the injection apparatus from chilling tower and the cleaning solution from washing liquid storage tank；Make the gas after first contacts
Body logistics is entered in the packing layer of tail gas absorber with adsorption stuffing therein with the second cleaning solution from cleaning solution spraying zone
Row second is contacted；
Wherein, the first cleaning solution after the first contact and the second cleaning solution after the second contact are in the bottom of tail gas absorber
Mixing, and circulate again as the first cleaning solution and/or the second cleaning solution.
Preferably, first cleaning solution is contacted in the way of screw spraying with the molecular sieve baking tail gases.
Preferably, the gas stream after second cleaning solution is contacted in the way of arc is sprayed with described first is contacted.
Preferably, the ratio between the height of described filler layer and the total height of the tail gas absorber are 0.10-0.25:1.
By above-mentioned technical proposal, two-way circulation is carried out in the processing equipment of molecular sieve baking tail gases using cleaning solution,
While cleaning solution utilization rate is improved, the waste heat of molecular sieve baking tail gases can be more effectively reclaimed, and it is contained
The removal of pollutant.
Other features and advantages of the present invention will be described in detail in subsequent embodiment part.
Brief description of the drawings
Accompanying drawing is, for providing a further understanding of the present invention, and to constitute a part for specification, with following tool
Body embodiment is used to explain the present invention together, but is not construed as limiting the invention.In the accompanying drawings：
Fig. 1 is the molecular sieve baking tail gases processing equipment of the molecular sieve baking tail gases processing method for the present invention.
Fig. 2 is the molecular sieve baking tail gases processing equipment for existing molecular sieve baking tail gases processing method.
Description of reference numerals
1 chilling tower, 2 tail gas absorbers, 3 washing liquid storage tanks；
The injection apparatus of 11 chilling towers, 23 packing layers
Embodiment
The embodiment to the present invention is described in detail below.It should be appreciated that described herein specific
Embodiment is merely to illustrate and explain the present invention, and is not intended to limit the invention.
In the present invention, in the case where not making opposite explanation, the noun of locality used such as " bottom ", " top " are to be directed to equipment
For arrangement in vertical height.But herein it should be noted that these nouns of locality do not refer to equipment on stricti jurise exists
The top and bottom on vertical direction.
Herein, described " the first cleaning solution " and " the second cleaning solution " are the engagement sequences according to cleaning solution and tail gas and ordered
Name, the composition contained by it does not have significant difference, herein, and " the first cleaning solution " and " the second cleaning solution " may be collectively referred to as
" cleaning solution ".
The invention provides a kind of processing method of molecular sieve baking tail gases, wherein, the processing method is as shown in Figure 1
Carried out in molecular sieve baking tail gases processing equipment, the equipment includes：Chilling tower 1, tail gas absorber 2 and washing liquid storage tank 3, it is described
The injection apparatus 11 for jet washing liquid is provided with chilling tower 1, the discharging opening of the chilling tower 1 is communicated to the tail gas and inhaled
The air-flow for receiving tower 2 enters area, is arranged at spray of the leakage fluid dram of the bottom of tail gas absorber 2 by pipeline respectively with the chilling tower 1
The liquid mouthful that returns of injection device 11, the cleaning solution spraying zone of the tail gas absorber 2 and the washing liquid storage tank 3 is connected, described to wash
The liquid outlet for washing liquid storage tank 3 passes through pipeline and the cleaning solution inlet communication on the top of chilling tower 1；
The tail gas absorber includes housing 21 and the packing layer 23 being arranged in housing 21, and will by packing layer 23
The inner space of housing 21 is divided into positioned at the cleaning solution spraying zone of packing layer more than 23 and positioned at packing layer from top to bottom
Less than 23 air-flow enters area；
Methods described includes：
Make the molecular sieve baking tail gases carry out first with the first cleaning solution in chilling tower 1 to contact, first washing
Liquid includes the cleaning solution of the injection apparatus 11 from chilling tower 1 and the cleaning solution from washing liquid storage tank 3；Make by the first contact
Gas stream afterwards in the packing layer 23 of tail gas absorber 2 with adsorption stuffing therein and from cleaning solution spraying zone second
Cleaning solution carries out second and contacted；
Wherein, the first cleaning solution after the first contact and the second cleaning solution after the second contact are at the bottom of tail gas absorber 2
Portion is mixed into mixed liquor, and circulates again as the first cleaning solution and/or the second cleaning solution.
According to the present invention, the molecular sieve baking tail gases have implication well known in the art, its contain substantial amounts of dust with
And the pollutant such as nitrogen oxides, sulfur dioxide；According to preparation of molecular sieve, tail gas is also possible to containing ammonia, and molecular sieve roasting
Temperature of the tail gas when leaving roaster is burnt up to 650 DEG C or so.
According to the present invention, first cleaning solution and the second cleaning solution are in the molecular sieve baking tail gases processing equipment
Recycling can specifically be divided into following two-way：Circulate all the way and be：Cleaning solution in washing liquid storage tank 3 described in conveying by washing
The configured cleaning solution entrance on the top of chilling tower 1 of pipeline for washing liquid enters chilling tower 1 as the cleaning solution of part first, then anxious
The first cleaning solution in cold tower 1 enters tail gas absorber 2 by the discharging opening gravity flow of the chilling tower 1 communicated with tail gas absorber 2
The part mixed liquor that the second cleaning solution after being contacted with second is mixed into mixed liquor, tail gas absorber 2 can be by being arranged at
The leakage fluid dram of the bottom of tail gas absorber 2 is back in washing liquid storage tank 3 by pipeline, so as to complete the systemic circulation of cleaning solution；It is another
Circulate on road：Part mixed liquor in tail gas absorber 2 can be by being arranged at the leakage fluid dram of the bottom of tail gas absorber 2 by pipeline
The injection apparatus 11 of chilling tower 1 is delivered to again as the cleaning solution of part first, and by being injected into chilling tower 1, then by with
The discharging opening for the chilling tower 1 that tail gas absorber 2 is communicated is back in tail gas absorber 2, and part mixed liquor is transported to absorption tower
Spraying zone is returned in tail gas absorber 2 as the second cleaning solution again, so as to complete self-loopa of the cleaning solution in absorption tower.
In addition, being also provided with other charging apertures and leakage fluid dram on the washing liquid storage tank 3, the others are entered
Material mouth can be used for supplementing fresh cleaning solution, the washing that other leakage fluid drams can be too high by temperature or poor absorbability
Liquid is discharged, for other processes.
By as above circulating, the utilization rate of cleaning solution is effectively improved, and the waste heat of molecular sieve baking tail gases is entered
Go and effectively reclaimed, the pollutant such as dust and ammonia also contained to it is effectively removed.
According to the present invention, generally, the temperature into the molecular sieve baking tail gases of chilling tower can be at 90-180 DEG C
In the range of.In addition, the temperature of the cleaning solution can be the temperature of the conventional cleaning solution in this area, and need to be significantly less than
Into the temperature of the molecular sieve baking tail gases of chilling tower, so that the waste heat of molecular sieve baking tail gases can be effectively absorbed.This area
Known in technical staff, after cleaning solution is circulated in equipment as described above and carries out heat exchange with tail gas, its temperature meeting
Rise significantly.Therefore, the temperature of the cleaning solution is general in the range of 20-50 DEG C.
According to the present invention, when the temperature of the cleaning solution is more than 60 DEG C, the washing that can be will loop in cleaning solution storage 3
Liquid is discharged and enters next procedure.
According to the present invention, the condition of first contact can be selected in wider scope, as long as ensureing after contact
The temperature of molecular sieve tail gas is down in the range of not higher than 90 DEG C, and those skilled in the art can be according to actual conditions voluntarily
Regulation.For example, the condition of first contact includes：The flow that the molecular sieve baking tail gases enter chilling tower 1 is 9000-
15000m3/ h, relative to molecular sieve baking tail gases every liter described, the consumption of first cleaning solution is 0.0013-0.0018 liters.
According to the present invention, the condition of second contact can also be selected in wider scope, as long as ensureing that second connects
The temperature of gas stream is down in the range of not higher than 80 DEG C after touch, can reach discharge standard, those skilled in the art
Can also voluntarily it be adjusted according to actual conditions.For example, the condition of second contact includes：Gas thing after first contact
The flow that stream enters the adsorption zone of tail gas absorber 2 is 9000-15000m3/ h, relative to the gas after the first contact every liter described
Body logistics, the consumption of second cleaning solution is 0.0016-0.0022 liters.
It was found by the inventors of the present invention that by the first cleaning solution with screw spraying by way of with the molecular sieve be calcined tail
Gas is contacted, and/or the molecular sieve baking tail gases after second cleaning solution is contacted in the way of arc is sprayed with described first
Contact, can further increase assimilation effect of the cleaning solution to the molecular sieve baking tail gases.It is therefore preferred that first is washed
Liquid is washed to contact with the molecular sieve baking tail gases in the way of screw spraying, second cleaning solution in the way of arc is sprayed with
Molecular sieve baking tail gases contact after first contact.
Wherein, the mode of the screw spraying can be by storing up in injection apparatus 11 and/or for spraying from cleaning solution
Cleaning solution in tank 3 is realized to setting spiral nozzle on the injection apparatus in chilling tower 1, and the mode of arc spray can
With by setting the nozzle with radian to realize on the injection apparatus of the cleaning solution spraying zone of tail gas absorber 2.The spiral
Nozzle and nozzle with radian can the nozzles for commercially available various spiral nozzles and with radian.
Present inventor has further discovered that, can by the way that the packing layer 23 of tail gas absorber 2 is maintained at into certain height
Further improve the absorption efficiency to molecular sieve baking tail gases.It is therefore preferred that the height of described filler layer is inhaled with the tail gas
It is 0.1-0.25 to receive the ratio between total height of tower:1, preferably 0.15-0.2:1.
Filler in described filler layer can be the conventional various fillers for molecular sieve vent gas treatment in this area, preferably
Ground, the filler is Pall ring and/or cascade ring.It is highly preferred that the Pall ring is plastics Pall ring, the cascade ring is modeling
Expect cascade ring.
First cleaning solution and second cleaning solution each can be used for molecule tail end for the various of this area routine
The cleaning solution of gas disposal.Preferably, first cleaning solution and second cleaning solution be pH value be not more than 7.0 acidity or in
Property absorbing liquid, it is further preferable that fresh absorbing liquid be dilute sulfuric acid, watery hydrochloric acid, neutral water or their mixture in one kind
Or it is a variety of.Wherein, the dilute sulfuric acid refers to the sulfuric acid that mass fraction is less than 10%, and watery hydrochloric acid refers to that mass fraction is less than 37%
Hydrochloric acid.
The present invention will be described in detail by way of examples below.In following examples,
The dustiness of pending molecular sieve baking tail gases is 160mg/m3, ammonia content is 2000mg/m3, temperature is 160
℃；
Pending molecular sieve baking tail gases are handled in molecular sieve baking tail gases equipment as described in Figure 1, described
In equipment, the injection apparatus 11 of chilling tower 1 is provided with spiral nozzle, and the cleaning solution from washing liquid storage tank 3 is same also by installing
The spiral nozzle of sample is sprayed, 5 altogether；
The injection apparatus 8 with arcuate nozzle is installed in the cleaning solution spraying zone of tail gas absorber 2；
The measure of dust content uses particulate matter in GB/T 16157-1996 Concentration in Fixed Pollutants Source to determine and gaseous contamination
The method of sampling of thing；
The use HJ/T 533-2009 Berthelot spectrophotometries of ammonia content；
Fresh wash liquid：The dilute sulfuric acid of mass fraction 5%.
Embodiment 1
The present embodiment is used for the processing method for illustrating the molecular sieve baking tail gases that the present invention is provided.
Molecular sieve baking tail gases are made to enter from the gas inlet of chilling tower 1, the flow that tail gas enters is 10000m3/ h,
Collectively constituted in chilling tower 1 with the cleaning solution of the injection apparatus 11 from chilling tower 1 and the cleaning solution from washing liquid storage tank 3
First cleaning solution is contacted, wherein, the temperature of the first cleaning solution is 20-50 DEG C, and tail is calcined relative to molecular sieve every liter described
Gas, the emitted dose of first cleaning solution is 0.0016 liter, and the temperature of the gas stream after the first contact is reduced to 70 DEG C.
The gas stream after the first contact is set to enter tail gas absorber, with the absorption in packing layer 23 in tail gas absorber
Filler and the contact of the second cleaning solution progress second from absorption tower cleaning solution spraying zone, wherein, the height of described filler layer
It is 0.15 with the ratio between the height of tail gas absorber:1, adsorption stuffing is plastics Pall ring, and the temperature of the second cleaning solution is 30-60
DEG C, sprayed in the way of arc is sprayed, the flow that the gas thing after the first contact enters packing layer 23 is 10000m3/ h,
With the adsorption stuffing in packing layer 23 and the second cleaning solution from absorption tower cleaning solution spraying zone second contact, relatively
Gas stream after every liter of first contact, the emitted dose of second cleaning solution is 0.002 liter, the gas after the second contact
The temperature of body logistics is 51 DEG C, and the tail gas after cooling discharges absorption tower from the top of tail gas absorber.Determine the tail gas after discharge
In smoke content and ammonia content, the results are shown in Table 1.
Wherein, the first cleaning solution after the first contact and the second cleaning solution after the second contact are at the bottom of tail gas absorber 2
Portion is mixed into mixed liquor, and circulates again as the first cleaning solution and/or the second cleaning solution.
Embodiment 2
The present embodiment is used for the processing method for illustrating the molecular sieve baking tail gases that the present invention is provided.
Molecular sieve baking tail gases are made to enter from the gas inlet of chilling tower 1, the flow that tail gas enters is 15000m3/ h,
Collectively constituted in chilling tower 1 with the cleaning solution of the injection apparatus 11 from chilling tower 1 and the cleaning solution from washing liquid storage tank 3
First cleaning solution is contacted, wherein, the first cleaning solution is sprayed in the method for spiral, and the temperature of the first cleaning solution is 20-
50 DEG C, relative to molecular sieve baking tail gases every liter described, the emitted dose of first cleaning solution is 0.0018 liter, after the first contact
The temperature of gas stream be reduced to 73 DEG C.
The gas stream after the first contact is set to enter tail gas absorber, with the absorption in packing layer 23 in tail gas absorber
Filler and the contact of the second cleaning solution progress second from absorption tower cleaning solution spraying zone, wherein, the height of described filler layer
It is 0.17 with the ratio between the height of tail gas absorber:1, adsorption stuffing is plastics cascade ring, and the temperature of the second cleaning solution is 30-60
DEG C, sprayed in the way of arc is sprayed, the flow that the gas thing after the first contact enters packing layer 23 is 12000m3/ h,
With the adsorption stuffing in packing layer 23 and the second cleaning solution from absorption tower cleaning solution spraying zone second contact, relatively
Gas stream after every liter of first contact, the emitted dose of second cleaning solution is 0.0019 liter, after the second contact
The temperature of gas stream is 56 DEG C, and the tail gas after cooling discharges absorption tower from the top of tail gas absorber.Determine the tail after discharge
The content of smoke content and ammonia in gas, the results are shown in Table 1.
Wherein, the first cleaning solution after the first contact and the second cleaning solution after the second contact are in tail gas absorber (2)
Bottom is mixed into mixed liquor, and circulates again as the first cleaning solution and/or the second cleaning solution.
Embodiment 3
The present embodiment is used for the processing method for illustrating the molecular sieve baking tail gases that the present invention is provided.
Molecular sieve baking tail gases are made to enter from the gas inlet of chilling tower 1, the flow that tail gas enters is 13000m3/ h,
Collectively constituted in chilling tower 1 with the cleaning solution of the injection apparatus 11 from chilling tower 1 and the cleaning solution from washing liquid storage tank 3
First cleaning solution is contacted, wherein, the first cleaning solution is sprayed in the method for spiral, and the temperature of the first cleaning solution is 20-
50 DEG C, relative to molecular sieve baking tail gases every liter described, the emitted dose of first cleaning solution is 0.00154 liter, the first contact
The temperature of gas stream afterwards is reduced to 72 DEG C.
The gas stream after the first contact is set to enter tail gas absorber, with the absorption in packing layer 23 in tail gas absorber
Filler and the contact of the second cleaning solution progress second from absorption tower cleaning solution spraying zone, wherein, the height of described filler layer
It is 0.20 with the ratio between the height of tail gas absorber:1, adsorption stuffing is plastics Pall ring, and the temperature of the second cleaning solution is 30-60
DEG C, sprayed in the way of arc is sprayed, the flow that the gas thing after the first contact enters packing layer 23 is 13000m3/ h,
With the adsorption stuffing in packing layer 23 and the second cleaning solution from absorption tower cleaning solution spraying zone second contact, relatively
Gas stream after every liter of first contact, the emitted dose of second cleaning solution is 0.00193 liter, after the second contact
The temperature of gas stream is 53 DEG C, and the tail gas after cooling discharges absorption tower from the top of tail gas absorber.Determine the tail after discharge
The content of smoke content and ammonia in gas, the results are shown in Table 1.
Wherein, the first cleaning solution after the first contact and the second cleaning solution after the second contact are in tail gas absorber (2)
Bottom is mixed into mixed liquor, and circulates again as the first cleaning solution and/or the second cleaning solution.
Embodiment 4
The present embodiment is used for the processing method for illustrating the molecular sieve baking tail gases that the present invention is provided.
Method according to embodiment 1 is handled molecular sieve baking tail gases, wherein, unlike, chilling tower 1
Injection apparatus 11 is provided with back taper nozzle, and the cleaning solution from washing liquid storage tank 3 is sprayed also by spiral nozzle is installed；
The cleaning solution spraying zone injection apparatus of tail gas absorber 2 is provided with spiral nozzle.It the results are shown in Table 1.
Embodiment 5
The present embodiment is used for the processing method for illustrating the molecular sieve baking tail gases that the present invention is provided.
Method according to embodiment 1 is handled molecular sieve baking tail gases, wherein, unlike, the filler
The ratio between the height of layer 23 and the height of tail gas absorber are 0.12:1.It the results are shown in Table 1.
Comparative example 1
This comparative example is used for the processing method for illustrating existing molecular sieve baking tail gases.
Method according to embodiment 1 is handled molecular sieve baking tail gases, wherein, unlike, the processing
Carried out in the device described in Fig. 2, that is, cleaning solution is not supplied directly into chilling tower 1 in the washing liquid storage tank 3, as
The cleaning solution of the cleaning solution of another part first is the fresh cleaning solution by other pipeline supply.It the results are shown in Table 1.
Table 1
| Dust content mg/m3 | Ammonia content mg/m3 | Tail gas discharge temperature (DEG C) | |
| Embodiment 1 | 22 | 103 | 51 |
| Embodiment 2 | 25 | 113 | 56 |
| Embodiment 3 | 23 | 110 | 53 |
| Embodiment 4 | 28 | 122 | 60 |
| Embodiment 5 | 30 | 125 | 63 |
| Comparative example 1 | 33 | 140 | 65 |
Effectively it can be reclaimed it can be seen from above example and comparative example using technical scheme in tail gas
Waste heat, and effective processing is carried out to the atmosphere pollution in tail gas, and also improve the utilization rate of cleaning solution.And
It is preferred that in the case of, for example, changing the spray angle of the first cleaning solution and/or the second cleaning solution, and/or change the height of packing layer
Degree can further improve effect as above.
In addition, determining the content for the sulfur dioxide for discharging tail gas, Yi Jitong by HJ/T 57-2000 constant potentiometric electrolysis
The nitrogen oxide in tail gas for crossing the measure discharge of air and waste gas method for monitoring and analyzing fourth edition (addendum) constant potentiometric electrolysis contains
Amount, method of the invention can effectively control it under discharge standard.
The preferred embodiment of the present invention described in detail above, still, the present invention are not limited in above-mentioned embodiment
Detail, in the range of the technology design of the present invention, a variety of simple variants can be carried out to technical scheme, this
A little simple variants belong to protection scope of the present invention.
It is further to note that each particular technique feature described in above-mentioned embodiment, in not lance
In the case of shield, it can be combined by any suitable means.In order to avoid unnecessary repetition, the present invention to it is various can
The combination of energy no longer separately illustrates.
In addition, various embodiments of the present invention can be combined randomly, as long as it is without prejudice to originally
The thought of invention, it should equally be considered as content disclosed in this invention.
Claims (10)
1. a kind of processing method of molecular sieve baking tail gases, it is characterised in that the processing method is in the processing of molecular sieve baking tail gases
Carried out in equipment, the equipment includes：In chilling tower (1), tail gas absorber (2) and washing liquid storage tank (3), the chilling tower (1)
The injection apparatus (11) for jet washing liquid is provided with, the discharging opening of the chilling tower (1) is communicated to the tail gas absorber
(2) air-flow enters area, be arranged at the leakage fluid dram of tail gas absorber (2) bottom by pipeline respectively with the chilling tower (1)
The liquid mouthful that returns of injection apparatus (11), the cleaning solution spraying zone of the tail gas absorber (2) and the washing liquid storage tank (3) connects
Logical, the liquid outlet of the washing liquid storage tank (3) passes through pipeline and the cleaning solution inlet communication on chilling tower (1) top；
The tail gas absorber includes housing (21) and the packing layer (23) being arranged in housing (21), and passes through packing layer
(23) by the inner space of housing (21) be divided into from top to bottom be located at packing layer (23) more than cleaning solution spraying zone and
Enter area positioned at the air-flow of packing layer (23) below；
The ratio between the height of described filler layer (23) and the total height of the tail gas absorber (2) are 0.15-0.2:1；
Methods described includes：
Make the molecular sieve baking tail gases carry out first with the first cleaning solution in chilling tower (1) to contact, first cleaning solution
Cleaning solution including the injection apparatus (11) from chilling tower (1) and the cleaning solution from washing liquid storage tank (3)；Make by first
Gas stream after contact is in the packing layer (23) of tail gas absorber (2) with adsorption stuffing therein and from cleaning solution spray
Second cleaning solution in area carries out second and contacted；
Wherein, first contact after the first cleaning solution and second contact after the second cleaning solution tail gas absorber (2) bottom
Mixed liquor is mixed into, and is circulated again as the first cleaning solution and the second cleaning solution.
2. according to the method described in claim 1, wherein, the temperature of the molecular sieve baking tail gases is 90-180 DEG C, described the
The temperature of one cleaning solution is 20-50 DEG C, and the condition of first contact includes：The molecular sieve baking tail gases enter chilling tower
(1) flow is 9000-15000m3/ h, relative to molecular sieve baking tail gases every liter described, the consumption of first cleaning solution is
0.0013-0.0018 liters.
3. method according to claim 1 or 2, wherein, the temperature of second cleaning solution is 30-60 DEG C, described second
The condition of contact includes：The flow for the adsorption zone that gas stream after first contact enters tail gas absorber (2) is 9000-
15000m3/ h, relative to the gas stream after the first contact every liter described, the consumption of second cleaning solution is 0.0016-
0.0022 liter.
4. method according to claim 1 or 2, wherein, first cleaning solution in the way of screw spraying with described point
Son sieve baking tail gases contact.
5. according to the method described in claim 1, wherein, second cleaning solution connects in the way of arc is sprayed with described first
Gas stream contact after touch.
6. method according to claim 3, wherein, second cleaning solution connects in the way of arc is sprayed with described first
Gas stream contact after touch.
7. according to the method described in claim 1, wherein, adsorption stuffing in described filler layer (23) is Pall ring and/or rank
Terraced ring.
8. method according to claim 7, wherein, the filler is plastics Pall ring and/or plastics cascade ring.
9. according to the method described in claim 1, wherein, first cleaning solution and second cleaning solution are not more than for pH value
7.0 acid or neutral absorbing liquid.
10. method according to claim 9, wherein, fresh absorbing liquid be one kind in sulfuric acid, hydrochloric acid and neutral water or
It is a variety of.
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| US3894853A (en) * | 1974-07-10 | 1975-07-15 | Air Pollution Ind | Gas treating apparatus |
| CN102139180A (en) * | 2010-02-02 | 2011-08-03 | 天华化工机械及自动化研究设计院 | Refining catalyst spray drying tail gas/roasting tail gas purifying treatment method and equipment |
| CN101954239B (en) * | 2010-09-26 | 2013-01-23 | 攀钢集团钢铁钒钛股份有限公司 | Method for removing sulphate and ammonia from smoke |
| CN202860390U (en) * | 2012-10-26 | 2013-04-10 | 中国石油化工股份有限公司 | Ammonia-process cleaning and purifying device of sulfur-containing tail gas |
| CN203043827U (en) * | 2013-01-09 | 2013-07-10 | 王志雅 | Device for recovering sulfur dioxide from high-temperature smoke gas |
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