CN109876607A - A kind of exhaust gas treating method handling sulfur dioxide - Google Patents
A kind of exhaust gas treating method handling sulfur dioxide Download PDFInfo
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- CN109876607A CN109876607A CN201910146680.0A CN201910146680A CN109876607A CN 109876607 A CN109876607 A CN 109876607A CN 201910146680 A CN201910146680 A CN 201910146680A CN 109876607 A CN109876607 A CN 109876607A
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Abstract
The invention discloses a kind of exhaust gas treating methods for handling sulfur dioxide, existing exhaust gas treating method is when handling tail gas, sulfur dioxide in tail gas cannot be recycled, to increase cost, cause the wasting of resources, and existing sulfur dioxide treatment method is bad to the treatment effect of tail gas, handle it is unclean, to cause problem of environmental pollution.The present invention passes through under the subnormal ambient in desorption tower, most of sulfur dioxide is come out by air bells stripping enters purification system, sulfur dioxide is recycled to realize, reduces costs, avoids the wasting of resources, and atomizing spray is carried out to tail gas by dilute hydrogen peroxide solution, last oxidative absorption processing is carried out to tail gas, uses tower sulfur dioxide in tail gas content far below national standard, so as to effectively handle sulfur dioxide in tail gas, processing is more clean, pollutes the environment to reduce.
Description
Technical field
The present invention relates to tail gas disposal technique field, specially a kind of exhaust gas treating method for handling sulfur dioxide.
Background technique
Sulfur dioxide (chemical formula SO2) is most common, simplest oxysulfide, and one of Air Pollutant Discharge is being permitted
A large amount of sulfur dioxide can be generated during multiplexing industry, and since coal and petroleum usually all contain element sulphur, meeting when burning
Sulfur dioxide is generated, when sulfur dioxide is soluble in water, will form sulfurous acid, if the further item existing for PM2.5 of sulfurous acid
Aoxidized under part, sulfuric acid (main component of acid rain) will be efficiently produced rapidly, here it is to use these fuel as the energy
One of the reason of environmental effect is worried.
However the sulfur dioxide in tail gas cannot be carried out circulation benefit when handling tail gas by existing processing method
With, to increase cost, cause the wasting of resources, and existing sulfur dioxide treatment method to the treatment effect of tail gas not
Good, processing is not clean, to improve problem of environmental pollution.
Summary of the invention
The purpose of the present invention is to provide a kind of exhaust gas treating methods for handling sulfur dioxide, to solve above-mentioned background technique
The problem of middle proposition.
To achieve the above object, the invention provides the following technical scheme: it is a kind of handle sulfur dioxide exhaust gas treating method,
It comprises the following steps that
Step 1: preliminary treatment being carried out to the tail gas containing sulfur dioxide, industrial sulphuric acid is produced using " contact method ", obtains tail
Gas A；
Step 2: purified treatment being carried out to tail gas A, tail gas A is imported to the inside of tower electricity one-piece absorbent tower, passes through tower electricity
The first order absorption section and primary cycle liquid of one-piece absorbent tower inner bottom are absorbed, then are pumped by primary cycle by tail gas A
Export, to obtain tail gas B；Tail gas is imported into the second level absorber portion of tower electricity one-piece absorbent tower by first order absorption section top
Interior, tail gas A absorbs by secondary cycle liquid and is oxidized to sulfuric acid, to obtain tail gas D；
Step 3: desorption processing is carried out to tail gas B, tail gas B is entered in sulfur dioxide desorption tower by primary cycle pump,
Under subnormal ambient in desorption tower, sulfur dioxide is come out by air bells stripping enters purification system, to obtain tail gas C；
Step 4: oxidative absorption processing being carried out to tail gas D, by the eddy flow orifice plate at the top of second level absorber portion, on eddy flow orifice plate
Three-level absorber portion sprayed by second level spray liquid, to obtain tail gas E；
Step 5: the tail gas after three-level absorbs enters absorption tower top electrostatic precipitator, removes acid mist by electrostatic interaction
By chimney high altitude discharge.
Preferably, tail gas B being entered into first order absorption section from bottom to top, the primary cycle spray is dilution heat of sulfuric acid, and
The temperature of dilution heat of sulfuric acid is 35 DEG C, and the first order absorption section is internally provided with level-one packing layer.
Preferably, the bottom of first order absorption section is provided with circulating slot, and first grade absorption tower pumped far from primary cycle one
Side is provided with pipeline, and tail gas B imports the inside of circulating slot by pipeline, and the outlet end of primary cycle pump is additionally provided with shunting
Pipe, and extra circulation fluid imports dry absorption section by isocon.
Preferably, the secondary cycle spray liquid is dilute sulfuric acid and dioxygen water mixed liquid, and dilute sulfuric acid and hydrogen peroxide mix
Liquid temperature is 40 DEG C, and the second level absorber portion is provided with second level packing layer, and tail gas A and secondary cycle spray liquid are in second level packing layer
Interior progress gas-liquid contact mass transfer.
Preferably, the bottom of second level absorber portion is provided with liquid holding groove, and liquid holding groove is internally provided with central tube, it is described
The bottom of liquid holding groove is evenly arranged with multiple groups run-down leg, and the bottom end of liquid holding groove inner wall is provided with outlet tube.
Preferably, the three-level spray liquid is dilute hydrogen peroxide solution.
Preferably, the tower electricity one-piece absorbent tower is divided into one, two, three circulated sprinkling system and top electricity from bottom to top
Demister.
Compared with prior art, the beneficial effects of the present invention are: the present invention is by leading the tail gas for containing trace sulfur dioxide
Enter first order absorption section, dissolves and absorbs most of sulfur dioxide by dilution heat of sulfuric acid, under the subnormal ambient in desorption tower, big portion
Divide sulfur dioxide to be come out by air bells stripping and enter purification system, recycles sulfur dioxide to realize, reduce costs, avoid
The wasting of resources, and gas-liquid contact mass transfer is carried out in second level packing layer by sulfur-containing tail gas and circulated sprinkling liquid, it is surplus in tail gas
Remaining sulfur dioxide is absorbed by hydrogen peroxide solution and aoxidizes generation sulfuric acid, then falls in second level absorber portion bottom with circulation fluid
Portion, and atomizing spray is carried out to tail gas by dilute hydrogen peroxide solution, last oxidative absorption is carried out to tail gas and is handled, it is ensured that goes out tower
Tail gas sulphur dioxide content is far below national standard, to keep sulfur dioxide treatment method more preferable to the treatment effect of tail gas, locates
Reason is more clean, pollutes the environment to reduce.
Detailed description of the invention
Fig. 1 is process flow chart of the invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Referring to Fig. 1, a kind of embodiment provided by the invention: a kind of exhaust gas treating method handling sulfur dioxide, including
It has the following steps:
Step 1: preliminary treatment being carried out to the tail gas containing sulfur dioxide, industrial sulphuric acid is produced using " contact method ", obtains tail
Gas A；
Step 2: purified treatment being carried out to tail gas A, tail gas A is imported to the inside of tower electricity one-piece absorbent tower, passes through tower electricity
The first order absorption section and primary cycle liquid of one-piece absorbent tower inner bottom are absorbed, then are pumped by primary cycle by tail gas A
Export, to obtain tail gas B；Tail gas is imported into the second level absorber portion of tower electricity one-piece absorbent tower by first order absorption section top
Interior, tail gas A absorbs by secondary cycle liquid and is oxidized to sulfuric acid, to obtain tail gas D；
Step 3: desorption processing is carried out to tail gas B, tail gas B is entered in sulfur dioxide desorption tower by primary cycle pump,
Under subnormal ambient in desorption tower, sulfur dioxide is come out by air bells stripping enters purification system, to obtain tail gas C；
Step 4: oxidative absorption processing being carried out to tail gas D, by the eddy flow orifice plate at the top of second level absorber portion, on eddy flow orifice plate
Three-level absorber portion sprayed by three-level spray liquid, to obtain tail gas E；
Step 5: the tail gas after three-level absorbs enters absorption tower top electrostatic precipitator, removes acid mist by electrostatic interaction
By chimney high altitude discharge.
In this embodiment: the present invention carries out preliminary treatment according to step 1, to the tail gas containing sulfur dioxide, using " contact
Method " produces industrial sulphuric acid, 3+2 double-absorption, using troilite as primary raw material, using industrial waste sulfuric acid as auxiliary material, through boiling
Sulfur dioxide flue gas is produced in furnace roasting, and high-temperature flue gas enters cleaning procedure after afterheat boiler system cools down, through cyclone dust collectors
Most of flue dust is removed, removes remaining flue dust using electric precipitator, weak acid scrubbing removes the impurity in gas, then through electric demisting
Device, which removes, obtains clean sulfur dioxide flue gas after acid mist, purified flue gas after drying tower is dried with 93% concentrated sulfuric acid by
Enter a conversion procedure (i.e. one, two, three section of converter), the dioxy in flue gas after main blower boosting and heat exchanger heating
Change sulphur and be converted to sulfur trioxide under the catalytic action of catalyst, obtains the sulfur trioxide flue gas containing a small amount of sulfur dioxide, then send
Enter a suction tower and absorb sulfur trioxide therein with 98% concentrated sulfuric acid, the cold flue gas containing a small amount of sulfur dioxide of a suction tower is by changing out
It is again introduced into secondary conversion process (i.e. four, five sections of converter) after hot device heating, the low concentration sulfur trioxide cigarette after secondary conversion
Gas enters two suction towers and 98% concentrated sulfuric acid is used to absorb again, and the flue gas containing trace sulfur dioxide of two suction towers enters vent gas treatment side out
Method, qualified discharge after treatment, to obtain tail gas A.
Embodiment 1
As a preferred embodiment of the present invention, according to step 2, tail gas B is entered into first order absorption section, institute from bottom to top
Stating primary cycle spray is dilution heat of sulfuric acid, and the temperature of dilution heat of sulfuric acid is 35 DEG C, and the inside of the first order absorption section is arranged
There is level-one packing layer.
In embodiment: the exhaust gas treating method of this kind processing sulfur dioxide will be by that will contain the tail gas of trace sulfur dioxide certainly
It is lower and upper into first order absorption section, and primary cycle spray is dilution heat of sulfuric acid, temperature is maintained at 35 DEG C, makes tail gas B and dilute sulphur
Acid solution carries out gas-liquid contact mass transfer in level-one packing layer, and most of sulfur dioxide in tail gas is dissolved by dilution heat of sulfuric acid to be inhaled
It receives.
Embodiment 2
As a preferred embodiment of the present invention, according to step 2, the bottom of first order absorption section is provided with circulating slot,
And first grade absorption tower is provided with pipeline far from the side that primary cycle pumps, tail gas B imports the inside of circulating slot, level-one by pipeline
The outlet end of circulating pump is additionally provided with isocon, and extra circulation fluid imports dry absorption section by isocon.
In embodiment: the exhaust gas treating method that this kind handles sulfur dioxide passes through desorption tower bottom pipe for primary cycle
Liquid is back to first order absorption section bottom cycle slot, and in addition air also takes away the partial heat in circulation fluid, realizes circulation fluid cooling,
Suitable one is maintained to inhale circulation fluid temperature, in addition isocon is arranged to control primary cycle tank liquor position in primary cycle pump discharge, more
Remaining circulation fluid is sent to dry absorption section.
Embodiment 3
As a preferred embodiment of the present invention, according to step 2, the secondary cycle spray liquid is dilute sulfuric acid and dioxygen
Water mixed liquid, and dilute sulfuric acid and hydrogen peroxide mixeding liquid temperature are 40 DEG C, the second level absorber portion is provided with second level packing layer, tail gas
A and secondary cycle spray liquid carry out gas-liquid contact mass transfer in second level packing layer.
In embodiment: this kind handle sulfur dioxide exhaust gas treating method by secondary cycle spray liquid be dilute sulfuric acid and
Dioxygen water mixed liquid, temperature are maintained at 40 DEG C, thus react tail gas A with dilute sulfuric acid and dioxygen water mixed liquid,
Keep the effect of reaction more preferable, and tail gas A and secondary cycle spray liquid carry out gas-liquid contact mass transfer in second level packing layer, in tail gas
Remaining sulfur dioxide is absorbed by hydrogen peroxide solution and aoxidizes generation sulfuric acid.
Embodiment 4
As a preferred embodiment of the present invention, according to step 4, the bottom of second level absorber portion is provided with liquid holding groove,
And liquid holding groove is internally provided with central tube, the bottom of the liquid holding groove is evenly arranged with multiple groups run-down leg, and liquid holding groove
The bottom end of inner wall is provided with outlet tube.
In embodiment: the exhaust gas treating method of this kind processing sulfur dioxide passes through at the bottom setting center of liquid holding groove
Cylinder, and several run-down legs are uniform-distribution in the bottom of liquid holding groove, secondary cycle liquid is imported by liquid holding groove by overflow pipe
It is interior, to be collected to secondary cycle liquid, and by the way that outlet tube is arranged on the inner wall of liquid holding groove, preferably by secondary cycle
Liquid export.
Embodiment 5
As a preferred embodiment of the present invention, according to step 4, the three-level spray liquid is dilute hydrogen peroxide solution.
In embodiment: the exhaust gas treating method of this kind processing sulfur dioxide is by keeping dilute dioxygen from medial launder water-soluble
Liquid carries out atomizing spray by spray head under the action of pump, keeps the treatment effect of tail gas more preferable.
Embodiment 6
As a preferred embodiment of the present invention, according to step 2, the tower electricity one-piece absorbent tower is divided into from bottom to top
One, two, three circulated sprinkling system and top electrostatic precipitator.
In embodiment: the exhaust gas treating method of this kind processing sulfur dioxide is by the way that tower electricity one-piece absorbent tower to be arranged
One, two, three circulated sprinkling system sprays tail gas by three groups of different spray liquids, makes at the tail gas of sulfur dioxide
It is more preferable to manage effect, and by remaining acid mist in electrostatic precipitator removing tail gas, tail gas is more pure to make that treated.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case where without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Benefit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent elements of the claims
Variation is included within the present invention.Any reference signs in the claims should not be construed as limiting the involved claims.
Claims (7)
1. a kind of exhaust gas treating method for handling sulfur dioxide, it is characterised in that: comprise the following steps that
Step 1: preliminary treatment being carried out to the tail gas containing sulfur dioxide, industrial sulphuric acid is produced using " contact method ", obtains tail gas A；
Step 2: purified treatment being carried out to tail gas A, tail gas A is imported to the inside of tower electricity one-piece absorbent tower, passes through tower electricity one
The first order absorption section and primary cycle liquid of formula absorption tower inner bottom are absorbed, then are pumped by primary cycle and exported tail gas A,
To obtain tail gas B；By tail gas by being imported into the second level absorber portion of tower electricity one-piece absorbent tower at the top of first order absorption section, tail
Gas A absorbs by secondary cycle liquid and is oxidized to sulfuric acid, to obtain tail gas D；
Step 3: desorption processing being carried out to tail gas B, tail gas B is entered in sulfur dioxide desorption tower by primary cycle pump, de-
It inhales under the subnormal ambient in tower, sulfur dioxide is come out by air bells stripping enters purification system, to obtain tail gas C；
Step 4: oxidative absorption processing is carried out to tail gas D, by the eddy flow orifice plate at the top of second level absorber portion, on eddy flow orifice plate three
Grade absorber portion is sprayed by second level spray liquid, to obtain tail gas E；
Step 5: the tail gas after three-level absorbs enters absorption tower top electrostatic precipitator, passes through after removing acid mist by electrostatic interaction
Chimney high altitude discharge.
2. a kind of exhaust gas treating method for handling sulfur dioxide according to claim 1, it is characterised in that: certainly by tail gas B
Lower and upper into first order absorption section, the primary cycle spray is dilution heat of sulfuric acid, and the temperature of dilution heat of sulfuric acid is 35 DEG C, institute
That states first order absorption section is internally provided with level-one packing layer.
3. a kind of exhaust gas treating method for handling sulfur dioxide according to claim 1, it is characterised in that: in first order absorption
The bottom of section is provided with circulating slot, and first grade absorption tower is provided with pipeline far from the side that primary cycle pumps, and tail gas B passes through pipeline
The inside of circulating slot is imported, the outlet end of primary cycle pump is additionally provided with isocon, and extra circulation fluid passes through isocon
Import dry absorption section.
4. a kind of exhaust gas treating method for handling sulfur dioxide according to claim 1, it is characterised in that: the second level is followed
Ring spray liquid is dilute sulfuric acid and dioxygen water mixed liquid, and dilute sulfuric acid and hydrogen peroxide mixeding liquid temperature are 40 DEG C, and the second level absorbs
Section is provided with second level packing layer, and tail gas A and secondary cycle spray liquid carry out gas-liquid contact mass transfer in second level packing layer.
5. a kind of exhaust gas treating method for handling sulfur dioxide according to claim 1, it is characterised in that: absorbed in second level
The bottom of section is provided with liquid holding groove, and liquid holding groove is internally provided with central tube, and the bottom of the liquid holding groove is evenly arranged with more
Group run-down leg, and the bottom end of liquid holding groove inner wall is provided with outlet tube.
6. a kind of exhaust gas treating method for handling sulfur dioxide according to claim 1, it is characterised in that: the three-level spray
Leaching liquid is dilute hydrogen peroxide solution.
7. a kind of exhaust gas treating method for handling sulfur dioxide according to claim 1, it is characterised in that: the tower electricity one
Body formula absorption tower is divided into one, two, three circulated sprinkling system and top electrostatic precipitator from bottom to top.
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| CN201910146680.0A CN109876607A (en) | 2019-02-27 | 2019-02-27 | A kind of exhaust gas treating method handling sulfur dioxide |
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| CN201910146680.0A CN109876607A (en) | 2019-02-27 | 2019-02-27 | A kind of exhaust gas treating method handling sulfur dioxide |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101492154A (en) * | 2009-02-12 | 2009-07-29 | 中国瑞林工程技术有限公司 | Method for economically recycling sulphur dioxide from low-concentration or non-continuity flue gas to produce sulphuric acid |
| CN203017955U (en) * | 2012-12-12 | 2013-06-26 | 湖南碧绿环保产业发展有限公司 | Multistage circulation system for flue gas treatment |
| CN103303877A (en) * | 2013-07-03 | 2013-09-18 | 中国瑞林工程技术有限公司 | Comprehensive multi-gas source low-concentration SO2 fume recycling acid-making technological process |
| CN204684940U (en) * | 2015-06-10 | 2015-10-07 | 湖北蔚天环保科技有限公司 | A kind of hydrogen peroxide hollow-spraying-tower desulphurization system |
| CN106178951A (en) * | 2016-09-08 | 2016-12-07 | 攀钢集团攀枝花钢铁研究院有限公司 | Flue gas desulfurization absorbs resolution system and analytic method |
| CN106422731A (en) * | 2016-08-31 | 2017-02-22 | 上海京藤化工有限公司 | Tail gas absorption device for sulfuric acid production device |
-
2019
- 2019-02-27 CN CN201910146680.0A patent/CN109876607A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101492154A (en) * | 2009-02-12 | 2009-07-29 | 中国瑞林工程技术有限公司 | Method for economically recycling sulphur dioxide from low-concentration or non-continuity flue gas to produce sulphuric acid |
| CN203017955U (en) * | 2012-12-12 | 2013-06-26 | 湖南碧绿环保产业发展有限公司 | Multistage circulation system for flue gas treatment |
| CN103303877A (en) * | 2013-07-03 | 2013-09-18 | 中国瑞林工程技术有限公司 | Comprehensive multi-gas source low-concentration SO2 fume recycling acid-making technological process |
| CN204684940U (en) * | 2015-06-10 | 2015-10-07 | 湖北蔚天环保科技有限公司 | A kind of hydrogen peroxide hollow-spraying-tower desulphurization system |
| CN106422731A (en) * | 2016-08-31 | 2017-02-22 | 上海京藤化工有限公司 | Tail gas absorption device for sulfuric acid production device |
| CN106178951A (en) * | 2016-09-08 | 2016-12-07 | 攀钢集团攀枝花钢铁研究院有限公司 | Flue gas desulfurization absorbs resolution system and analytic method |
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