CN102641647A - Recovery processing method for low-concentration stray smoke S02 - Google Patents
Recovery processing method for low-concentration stray smoke S02 Download PDFInfo
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- CN102641647A CN102641647A CN2012101077478A CN201210107747A CN102641647A CN 102641647 A CN102641647 A CN 102641647A CN 2012101077478 A CN2012101077478 A CN 2012101077478A CN 201210107747 A CN201210107747 A CN 201210107747A CN 102641647 A CN102641647 A CN 102641647A
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Abstract
The invention relates to a recovery processing method for low-concentration stray smoke S02 difficult to process, which comprises the following specific steps: (1) after low-concentration smoke is cooled, the low-concentration smoke enters the bottom of an absorption tower to carry out countercurrent contact with barren liquor which is sprayed from the top; (2) the absorption liquor in step (1) enters a rich liquor tank, rich liquor carries out countercurrent contact with steam in a desorption tower to separate S02 gas of which the volume fraction is more than 90%; (3) after S02 is separated from the absorption liquor, the absorption liquor becomes barren liquor, and the barren liquor is recycled in the adsorption tower; and (4) a barren liquor tank and the rick liquor tank are combined into a whole, the barren liquor is repeatedly adsorbed until a desorption volume fraction is achieved, adsorption is stopped, the desorption tower is started, the the desorption process lasts until the S02 volume fraction in the adsorption liquor is lowered to a set volume fraction, and the process is circulated. The recovery processing method for the low-concentration stray smoke S02 is economic and practical and has a good adsorption effect, and the smoke S02 with the low volume fraction is effectively recovered so as to reduce pollution on the environment.
Description
Technical field
The present invention relates to belong to metallurgical engineering technical field and chemical technology field, specifically a kind of low concentration spuious flue gas S0 hard to manage that is adapted to
2Recovery and treatment method.
Background technology
Along with the S0 that produces in the nonferrous metallurgical processes such as nickel, copper is arranged
2Flue gas increases year by year, has become severe contamination source in the localities, and discharge capacity surpasses its environmental carrying capacity already.Meanwhile, therefore China's sulphur inadequate resource is administering S0
2Reclaim the sulphur resource when polluting and not only have theory significance, and more be of practical significance.Some non-ferrous metal company is through setting up sulfuric acid and the sodium sulphite production system is recycled the S0 in the flue gas during smelting
2, research shows the S0 of relieving haperacidity flue gas
2Volume fraction should be controlled at 5% one 9.5%, and the flue gas volume mark that sodium sulfite production needs is then on average about 5%.Though two systems have reclaimed most of S0 in the flue gas
2, but its discharge volume mark still exceeds standard, and for volume fraction<3.5% flue gas during smelting, because a lot of technical barrier, its recycling is also unsuccessful.Wet process of FGD is the highest desulfur technology the widest with application of present industrialization degree, and absorbent has lime stone, alkali, ammonia, metal oxide, citrate etc. a variety of.But mostly exist absorption efficiency low, cause the discharging that exceeds standard, problem of environment pollution caused.
Summary of the invention
The objective of the invention is deficiency, a kind of absorption efficiency height, easy and simple to handle that has is provided, can effectively reduce a kind of spuious flue gas S0 of low concentration that is applied to of environmental pollution to above-mentioned prior art existence
2Recovery and treatment method.
For this reason, the technical scheme of employing is: the spuious flue gas SO of a kind of low concentration
2Recovery and treatment method, the concrete steps of this method are:
(1) said low-concentration flue gas cooling back gets into the bottom, absorption tower, with the lean solution counter current contacting from top spray under, and emptying after tail gas detected;
(2) absorption liquid in said (1) gets into the rich solution groove, and rich solution and steam are in the Analytic Tower counter current contacting, and the steam of process condenser is condensed, and isolating volume fraction is the S0 more than 90%
2Gas;
(3) absorption liquid is deviate from most of S0
2After become lean solution, get into the absorption tower recycle; Be absorption liquid on the absorption tower-rich solution groove-Analytic Tower-lean solution circulates between groove-absorption tower;
(4) said lean solution groove and rich solution groove are united two into one, lean solution absorbs repeatedly, until reaching the parsing volume fraction, then stops to absorb, and starts Analytic Tower, and resolving lasts till S0 in the absorption liquid
2Volume fraction is reduced to the setting volume fraction, moves in circles.
The invention has the beneficial effects as follows:
The present invention is applied in the spuious flue gas S0 hard to manage of low concentration in the smelting process
2Recycling on, this method simple possible, absorption efficiency is high; Realized low concentration S0
2Effective recovery and processing, both increased the commercial production value, reduced environmental pollution again.
Description of drawings
Fig. 1 apparatus and process schematic flow sheet of the present invention.
The specific embodiment
The spuious flue gas SO of a kind of low concentration
2Recovery and treatment method, the concrete steps of this method are:
(1) bottom, entering absorption tower, said low-concentration flue gas cooling back is with the lean solution counter current contacting under top spray, to accomplish absorption process to greatest extent, to being absorbed S0
2Flue tail gas detect the back emptying, at this moment, S0 in the tail gas
2Volume fraction be no more than 0.05%;
(2) absorption liquid in said (1) gets into the rich solution groove, and rich solution and steam are in the Analytic Tower counter current contacting, and the steam of process condenser is condensed, and isolating volume fraction is the S0 more than 90%
2Gas;
(3) absorption liquid is deviate from most of S0
2After become lean solution, get into the absorption tower recycle. be absorption liquid on the absorption tower-rich solution groove-Analytic Tower-lean solution circulates between groove-absorption tower;
(4) lean solution groove and rich solution groove are united two into one, lean solution absorbs repeatedly, until reaching the parsing volume fraction, then stops to absorb, and starts Analytic Tower, and resolving lasts till S0 in the absorption liquid
2Volume fraction is reduced to the setting volume fraction; Move in circles.
Low-concentration flue gas described in the present invention is supplied with by the flash stove of acid making system, belongs to flue gas during smelting, and absorption liquid natrium citricum quality meets GBl987-86 standard; This natrium citricum absorption liquid mass concentration is 0.5,0.6,0.7,0.8,0.9,1.0,1.1 or 1.25 mol/L; The natrium citricum absorption liquid pH is 4.0,4.2,4.4,4.5,4.7,4.8 or 5.0; For guaranteeing certain spraying intensity, the liquid-gas ratio of absorption liquid is 1:300,1:400 or 1:500; And liquid-gas ratio that can corresponding increase absorption liquid when flue gas S02 volume fraction reduces, for example: as flue gas S0
2Volume fraction was reduced to 1.5% o'clock, and the liquid-gas ratio of absorption liquid increases to 1:400.Move in circles promptly: treat that absorption liquid pH reduces to a certain degree, resolve, make S0 through Steam Heating
2Be able to take off suction, rich solution becomes lean solution, absorbs once more, resolves.
Specific embodiment of the present invention is: in the relieving haperacidity flue gas that certain company's flash stove is supplied with, and S0
2The volume fraction scope is 5.6%, provides flue gas dilution to use wind through two air compressor machines, with porch, absorption tower flue gas S0
2Volume fraction be adjusted between 2% different value as: 1.5%, 1.7%, 1.8% etc., with 0.5mol/L natrium citricum absorption liquid, its pH value is controlled to be 4.0, liquid-gas ratio is not more than under the condition of 1:350, S0 in the flue gas of tail gas exit
2Volume fraction is less than 0.05%, and the absorption tower absorption efficiency is not less than 98.5%, and economic analyzing efficiency 50%. is resolved back gas S0
2Volume fraction is not less than 90%, can produce liquid S0 after drying, the compression
2
Claims (3)
1. spuious flue gas SO of low concentration
2Recovery and treatment method is characterized in that: the concrete steps of this method are:
(1) said low-concentration flue gas cooling back gets into the bottom, absorption tower, with the lean solution counter current contacting from top spray under, and emptying after tail gas detected;
(2) absorption liquid in said (1) gets into the rich solution groove, and rich solution and steam are in the Analytic Tower counter current contacting, and the steam of process condenser is condensed, and isolating volume fraction is the S0 more than 90%
2Gas;
(3) absorption liquid is deviate from most of S0
2After become lean solution, get into the absorption tower recycle. be absorption liquid on the absorption tower-rich solution groove-Analytic Tower-lean solution circulates between groove-absorption tower;
(4) said lean solution groove and rich solution groove are united two into one, lean solution absorbs repeatedly, until reaching the parsing volume fraction, then stops to absorb, and starts Analytic Tower, and resolving lasts till S0 in the absorption liquid
2Volume fraction is reduced to the setting volume fraction, moves in circles.
2. method according to claim 1 is characterized in that: said absorption liquid is the natrium citricum absorption liquid, and its mass concentration is that 0.5 ~ 1.25 mol/L, pH are 4.0 ~ 5.0; And the liquid-gas ratio of absorption liquid is 1:500-1:300.
3. method according to claim 2 is characterized in that: as said low-concentration flue gas S0
2When volume fraction reduces, liquid-gas ratio that can corresponding increase absorption liquid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101077478A CN102641647A (en) | 2012-04-13 | 2012-04-13 | Recovery processing method for low-concentration stray smoke S02 |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012101077478A CN102641647A (en) | 2012-04-13 | 2012-04-13 | Recovery processing method for low-concentration stray smoke S02 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103301716A (en) * | 2013-06-30 | 2013-09-18 | 金川集团股份有限公司 | Irregular exhaustion flue gas treatment system and method in metal sulphide ore smelting |
| CN103432866A (en) * | 2013-07-09 | 2013-12-11 | 南京信息工程大学 | Membrane-based sulfur dioxide absorption compound collector |
| CN103591603A (en) * | 2012-08-16 | 2014-02-19 | 中国石油化工集团公司 | Synchronous decarburization method in flue gas afterheat recovery of heating furnace |
| CN106986313A (en) * | 2017-04-11 | 2017-07-28 | 付永全 | A kind of flue gas desulfurization with citrate solution and sulfur dioxide process for reclaiming |
| CN107055487A (en) * | 2017-01-17 | 2017-08-18 | 四川益能康生环保科技有限公司 | A kind of devices and methods therefor for reclaiming sulfur hot metal smelting flue gas Sulphuric acid |
| CN110292833A (en) * | 2019-06-14 | 2019-10-01 | 南京高源环保工程有限公司 | A kind of low-concentration sulfur dioxide gas sodium citrate sulfur method and equipment |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11319480A (en) * | 1998-05-21 | 1999-11-24 | Ishikawajima Harima Heavy Ind Co Ltd | Stack-integrated flue gas desulfurizer |
| CN201871322U (en) * | 2010-12-01 | 2011-06-22 | 中北大学 | Device for removing low-concentration sulfur dioxide in flue gas |
| CN102302894A (en) * | 2011-07-15 | 2012-01-04 | 攀钢集团攀枝花钢钒有限公司 | Renewable flue gas desulphurization process |
-
2012
- 2012-04-13 CN CN2012101077478A patent/CN102641647A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11319480A (en) * | 1998-05-21 | 1999-11-24 | Ishikawajima Harima Heavy Ind Co Ltd | Stack-integrated flue gas desulfurizer |
| CN201871322U (en) * | 2010-12-01 | 2011-06-22 | 中北大学 | Device for removing low-concentration sulfur dioxide in flue gas |
| CN102302894A (en) * | 2011-07-15 | 2012-01-04 | 攀钢集团攀枝花钢钒有限公司 | Renewable flue gas desulphurization process |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103591603A (en) * | 2012-08-16 | 2014-02-19 | 中国石油化工集团公司 | Synchronous decarburization method in flue gas afterheat recovery of heating furnace |
| CN103591603B (en) * | 2012-08-16 | 2016-01-13 | 中国石油化工集团公司 | The method of the synchronous decarburization of a kind of waste heat of flue gas of heating furnace removal process |
| CN103301716A (en) * | 2013-06-30 | 2013-09-18 | 金川集团股份有限公司 | Irregular exhaustion flue gas treatment system and method in metal sulphide ore smelting |
| CN103301716B (en) * | 2013-06-30 | 2015-08-12 | 金川集团股份有限公司 | Improper discharged gas fume treatment system and method in a kind of metal sulfide smelting |
| CN103432866A (en) * | 2013-07-09 | 2013-12-11 | 南京信息工程大学 | Membrane-based sulfur dioxide absorption compound collector |
| CN107055487A (en) * | 2017-01-17 | 2017-08-18 | 四川益能康生环保科技有限公司 | A kind of devices and methods therefor for reclaiming sulfur hot metal smelting flue gas Sulphuric acid |
| CN106986313A (en) * | 2017-04-11 | 2017-07-28 | 付永全 | A kind of flue gas desulfurization with citrate solution and sulfur dioxide process for reclaiming |
| CN110292833A (en) * | 2019-06-14 | 2019-10-01 | 南京高源环保工程有限公司 | A kind of low-concentration sulfur dioxide gas sodium citrate sulfur method and equipment |
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Application publication date: 20120822 |