CN102698584B - Sectional absorption ammonia desulfurization process and device - Google Patents
Sectional absorption ammonia desulfurization process and device Download PDFInfo
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- CN102698584B CN102698584B CN201210219246.9A CN201210219246A CN102698584B CN 102698584 B CN102698584 B CN 102698584B CN 201210219246 A CN201210219246 A CN 201210219246A CN 102698584 B CN102698584 B CN 102698584B
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Abstract
The invention relates to a sectional absorption ammonia desulfurization process and device. Desulfurization, oxidation and crystallization can be realized in a same absorption tower, and different structures and different absorbents are adopted in different absorption section layers, so that crystallization, absorption, dust removal and oxidation can be respectively performed in the corresponding sections; sulfur-containing smoke gas can enter from an inlet at the middle part of the absorption tower, sequentially upwards flow back and pass through a spraying layer, a packing layer and a defogging and washing layer, sulfur dioxide in the smoke gas can be removed, and the smoke gas can leave the absorption tower for exhaust after dust removal and defogging; the process flow is complex, the blockage is difficult to occur and long-period operation of equipment can be ensured; and the sulfur dioxide can be effectively removed, and ammonia sulfate dust particles generated during the desulfurization process can be simultaneously effectively removed.
Description
Technical field
The present invention relates to a kind of employing grading absorption ammonia desulfurizing process and device, relate in particular to flue gas ammonia method desulfurizing technology, can be applicable to electric power, metallurgy, environmental protection and chemical technology field.
Background technology
The ammonia-process desulfurization technique that utilizes ammonia to remove sulfide in flue gas as raw material has been widely used in the flue gas desulfurization project of electric power, metallurgy and chemical field.
At present, ammonia-process desulfurization technique has the multiple technologies such as single tower, double tower, multitower, wherein double tower ammonia-process desulfurization technique is applied in practical sulphur removal project the earliest, the feature of this technology is that desulfurization, crystallization are carried out respectively in two towers, the flue gas that boiler comes is introduced into a crystallizing tower above, then enters desulfuration absorbing tower below.In crystallizing tower, spray into ammonium sulfate slurries and contact with flue gas downstream (or adverse current), wherein ammonium sulfate slurries are supersaturated ammonium sulfate slurries, and in slurries, the solid content of ammonium sulfate is generally between 3 ~ 15%, and the effect of this tower is mainly crystallization, substantially there is no desulfurizing function; And spray into solution in absorption tower, contact with flue gas adverse current, solution is unsaturated ammonium sulfate, and ammonium sulfate concentrations is generally 5 ~ 30%, and this tower is substantial desulfurizing tower, desulfurization performance is high, and in this tower stock tank, be provided with oxidative system is ammonium sulfate by sulfite oxidation simultaneously.The advantage of double tower technology is that two towers are born respectively different effects, and obviously, easily long period operates in the division of labor.And absorption tower is below owing to adopting unsaturated ammonium sulfate as absorbent, desulfuration efficiency is high; Shortcoming be flow process compared with complicated, floor space large, cost is also higher.
Double tower technology also derives multitower technology, and its Typical Representative is that the absorption tower in double tower technology is further divided into again to absorption tower and oxidizing tower.In view of the quantity of tower in this technology is too many, it is excessive to take up an area, conventionally 3 towers are stacked up and down, topmost is absorption tower, and middle part is crystallizing tower, and bottom is oxidizing tower.Such layout has solved this technology and has taken up an area excessive shortcoming, but also causes flow process complicated simultaneously, easily stops up, and device is difficult to long-term operation.
And traditional single tower technology is that desulfurization, oxidation and crystallization are all arranged in same seat tower, flue gas enters from desulfurizing tower middle part, and upwards adverse current is by spraying layer and demister successively, and desulfurizing tower bottom is crystallization, oxidation stock tank.The advantage of this technology be structure and flow process simple, take up an area little, cost is low, shortcoming is because desulfurization, oxidation and crystallization are all in a tower, causing absorbent is supersaturation slurries, causes desulfuration efficiency to decrease, and the solid particle in slurries is easily carried and enters in atmosphere by flue gas.
Summary of the invention
The technical problem to be solved in the present invention is: overcome the above-mentioned shortcoming that double tower in traditional handicraft, multitower and traditional single tower technology exist, a kind of grading absorption ammonia desulfurizing process and device are provided, in same tower, realize desulfurization, oxidation and crystallization, flow process is complicated, be difficult for stopping up, guarantee equipment long-term operation; Not only can effectively remove sulfur dioxide, can also effectively remove the ammonium sulfate dust granules thing generating in sweetening process simultaneously.
For solving the problems of the technologies described above, the technical solution used in the present invention is:
A grading absorption ammonia desulfuration equipment, comprises an absorption tower, it is characterized in that: more than middle part, absorption tower, spraying layer, packing layer, demist flushing layer are set in tower from the bottom to top; One deck or which floor described spraying layer arrange according to the height of sulfur dioxide in flue gas content, and each spraying layer correspondence outside tower arranges a sprayed slurry circulating pump; Between packing layer and spraying layer, liquid header is set, packing layer and demist are rinsed between layer liquid distribution trough are set, and liquid distribution trough is connected with the filler spray pump outside tower, liquid header bonding pad spraying box, and filler spraying box is connected with filler spray pump; Described demist is rinsed layer and is arranged by lower leaf interval on demister and mist eliminator flushing layer; Demist is rinsed the void tower setting of layer top and is backed down outlet, and spraying layer below void tower arranges side entrance near tower center.
By technique scheme, described packing layer arranges liquid distribution trough and liquid header simultaneously; Liquid distribution trough is groove type distributor or fluid column distributor; Liquid header be swash plate collector.
By technique scheme, the height of packing layer is 0.4 ~ 4 meter.
By technique scheme, spraying layer adopts hollow cone nozzle.
By technique scheme, described demister is flap demister.
Adopt the grading absorption ammonia desulfurizing process of said apparatus, it is characterized in that: in same absorption tower, realize desulfurization, oxidation and crystallization, at different absorber portion layers, adopt different structures and different absorbents, each carries out in corresponding segmentation to make crystallization, absorption, dedusting and oxidation; Sulfur-containing smoke gas enters from absorption tower centre entrance, and upwards adverse current is rinsed layer by spraying layer, packing layer, demist successively, removes the sulfur dioxide in flue gas, and after dedusting, demist, leaves absorption tower discharge; Filler circulation fluid and sprayed slurry are ammonium sulfate; Desulfurizing tower entrance below void tower portion is crystallization, oxidation stock tank, and in this stock tank, ammonium sulfite is oxidized to ammonium sulfate, and continuous crystal growth.
By technique scheme, filler circulation fluid adopts 5% ~ 30% ammonium sulfate.
By technique scheme, the sprayed slurry that spraying layer adopts is ammonium sulfate slurries, its ammonium sulfate solid content 3 ~ 8%.
By technique scheme, the filler circulation fluid of packing layer recycles after treatment.
Adopt device of the present invention and technique, core technology has adopted grading absorption technique exactly, and grading absorption carries out in same absorption tower, adopts the ammonium sulfate slurries of high concentration at hypomere hollow-spraying-tower layer, ammonium sulfate solid content is 3 ~ 8%, and its effect is mainly desulfurization; According to the height of sulfur dioxide in flue gas content, correspondence arranges one deck or Multi-layer sprinkling layer, adopt hollow cone nozzle, this setting not only can select to open the variation that the different spray numbers of plies adapts to content of sulfur dioxide in operation flexibly, and in running, be not easy by Crystallization Plugging, guarantee equipment long-term operation; And at stage casing packing layer, adopt the ammonium sulfate of low concentration, and ammonium sulfate concentrations 5% ~ 30%, this packing layer not only has the ability that removes sulfur dioxide equally, can also remove ammonium sulfate dust granules thing simultaneously.Not only grading absorption desulfurization is carried out in same absorption tower, and oxidation, crystallization also complete in same tower, and flow process is simple, save and take up an area.
accompanying drawing explanation:
Below in conjunction with drawings and Examples, the present invention is described.
Fig. 1 is apparatus structure schematic diagram of the present invention.
Wherein: 1 absorption tower entrance; 2 absorption towers; 3 spraying layers; 4 swash plate collectors; 5 packing layers; 6 groove type distributors; 7 demisters; 8 mist eliminator flushing layers; 9 absorption tower outlets; 10 sprayed slurry circulating pumps; 11 filler spraying box; 12 filler spray pumps.
the specific embodiment:
Embodiment mono-:
By a kind of grading absorption ammonia desulfuration equipment of the invention process, comprise an absorption tower 2, it is characterized in that: more than 2 middle parts, absorption tower, spraying layer 3, packing layer 5, demist flushing layer are set in tower from the bottom to top; One deck or which floor described spraying layer 3 arrange according to the height of sulfur dioxide in flue gas content, and each spraying layer 3 correspondence outside tower arranges a sprayed slurry circulating pump 10; Swash plate collector 4(liquid header is set) between packing layer 5 and spraying layer 3, packing layer 5 and demist are rinsed between layer groove type distributor 6(liquid distribution trough are set), liquid distribution trough is connected with the filler spray pump 12 outside tower, liquid header bonding pad spraying box 11, filler spraying box 11 is connected with filler spray pump 12; Described demist is rinsed layer and is arranged by lower leaf interval on demister 7 and mist eliminator flushing layer 8; The absorption tower outlet 9 that layer 8 top void tower setting are backed down is rinsed in demist, and spraying layer 3 below void towers arrange side direction absorption tower entrance 1 near tower center.
By technique scheme, described packing layer 5 arranges liquid distribution trough and liquid header simultaneously.
By technique scheme, the height of packing layer 5 is 0.4 ~ 4 meter.
By technique scheme, spraying layer 3 adopts hollow cone nozzle.
By technique scheme, described demister 7 is flap demister.
Adopt the grading absorption ammonia desulfurizing process of said apparatus, it is characterized in that: interiorly on same absorption tower 2 realize desulfurization, oxidation and crystallization, at different absorber portion layers, adopt different structures and different absorbents, each carries out in corresponding segmentation to make crystallization, absorption, dedusting and oxidation; Sulfur-containing smoke gas enters from absorption tower centre entrance 1, and upwards adverse current is rinsed layer by spraying layer 3, packing layer 5, demist successively, removes the sulfur dioxide in flue gas, and after dedusting, demist, leaves absorption tower discharge; Filler circulation fluid and sprayed slurry are ammonium sulfate; Entrance below, absorption tower void tower portion is crystallization, oxidation stock tank, and in this stock tank, ammonium sulfite is oxidized to ammonium sulfate, and continuous crystal growth.
By technique scheme, filler circulation fluid adopts 5% ~ 30% ammonium sulfate.
By technique scheme, the sprayed slurry that spraying layer adopts is ammonium sulfate slurries, its ammonium sulfate solid content 3 ~ 8%.
By technique scheme, the filler circulation fluid of packing layer recycles after treatment.
Adopt device of the present invention and technique, core technology has adopted grading absorption technique exactly, and grading absorption carries out in same absorption tower, adopts the ammonium sulfate slurries of high concentration at hypomere hollow-spraying-tower layer, ammonium sulfate solid content is 3 ~ 8%, and its effect is mainly desulfurization; According to the height of sulfur dioxide in flue gas content, correspondence arranges one deck or Multi-layer sprinkling layer, adopt hollow cone nozzle, this setting not only can select to open the variation that the different spray numbers of plies adapts to content of sulfur dioxide in operation flexibly, and in running, be not easy by Crystallization Plugging, guarantee equipment long-term operation; And at stage casing packing layer, adopt the ammonium sulfate of low concentration, and ammonium sulfate concentrations 5% ~ 30%, this packing layer not only has the ability that removes sulfur dioxide equally, can also remove ammonium sulfate dust granules thing simultaneously.Not only grading absorption desulfurization is carried out in same absorption tower, and oxidation, crystallization also complete in same tower, and flow process is simple, save and take up an area.
Above disclosed is only preferred embodiment of the present invention, certainly can not limit with this interest field of the present invention, and the equivalence of therefore doing according to the present patent application the scope of the claims changes, and still belongs to protection scope of the present invention.
Claims (6)
1. a grading absorption ammonia desulfuration equipment, comprises an absorption tower, it is characterized in that: more than middle part, absorption tower, spraying layer, packing layer, demist flushing layer are set in tower from the bottom to top; One deck or which floor described spraying layer arrange according to the height of sulfur dioxide in flue gas content, and each spraying layer correspondence outside tower arranges a sprayed slurry circulating pump; Between packing layer and spraying layer, liquid header is set, packing layer and demist are rinsed between layer liquid distribution trough are set, and liquid distribution trough is connected with the filler spray pump outside tower, liquid header bonding pad spraying box, and filler spraying box is connected with filler spray pump; Described demist is rinsed layer and is arranged by lower leaf interval on demister and mist eliminator flushing layer; Demist is rinsed the void tower setting of layer top and is backed down outlet, and spraying layer below void tower arranges side entrance near tower center; Described packing layer arranges liquid distribution trough and liquid header simultaneously; Liquid distribution trough is groove type distributor or fluid column distributor; Liquid header be swash plate collector; The height of packing layer is 0.4 ~ 4 meter; Described demister is flap demister.
2. desulfurizer according to claim 1, is characterized in that: spraying layer adopts hollow cone nozzle.
3. adopt the grading absorption ammonia desulfurizing process of one of the claims 1-2 described device, it is characterized in that: in same absorption tower, realize desulfurization, oxidation and crystallization, at different absorber portion layers, adopt different structures and different absorbents, each carries out in corresponding segmentation to make crystallization, absorption, dedusting and oxidation; Sulfur-containing smoke gas enters from absorption tower centre entrance, and upwards adverse current is rinsed layer by spraying layer, packing layer, demist successively, removes the sulfur dioxide in flue gas, and after dedusting, demist, leaves absorption tower discharge; Filler circulation fluid and sprayed slurry are ammonium sulfate; Desulfurizing tower entrance below void tower portion is crystallization, oxidation stock tank, and in this stock tank, ammonium sulfite is oxidized to ammonium sulfate, and continuous crystal growth.
4. sulfur removal technology according to claim 3, is characterized in that: filler circulation fluid adopts 5% ~ 30% ammonium sulfate.
5. according to the sulfur removal technology described in claim 3 or 4, it is characterized in that: the sprayed slurry that spraying layer adopts is ammonium sulfate slurries, its ammonium sulfate solid content 3 ~ 8%.
6. sulfur removal technology according to claim 5, is characterized in that: the filler circulation fluid of packing layer recycles after treatment.
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| CN201210219246.9A CN102698584B (en) | 2012-06-29 | 2012-06-29 | Sectional absorption ammonia desulfurization process and device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103566746A (en) * | 2013-11-26 | 2014-02-12 | 武汉凯迪电力环保有限公司 | External efficient oxidation ammonia desulphurization process and device |
| CN104624038A (en) * | 2015-01-22 | 2015-05-20 | 张波 | Ammonia desulphurization process purifying and washing system and purifying and washing method thereof |
| CN104874273B (en) * | 2015-05-12 | 2017-09-22 | 安徽金森源环保工程有限公司 | A kind of Novel desulfurization tower depth demisting, except the residual dirt device of the spittle |
| CN105854566A (en) * | 2016-06-06 | 2016-08-17 | 张波 | Single-tower five-section gradient purification, sulfur removal and dust removal ultra-low emission integrated device |
| CN107774082B (en) * | 2016-08-31 | 2020-10-16 | 中国石油化工股份有限公司 | Method and device for flue gas desulfurization |
| CN107051060A (en) * | 2016-12-23 | 2017-08-18 | 江苏和亿昌环保工程科技有限公司 | A kind of desulfurizing tower wet dust separater and method |
| CN110559817B (en) * | 2018-06-05 | 2021-10-08 | 中国石油化工股份有限公司 | Flue gas desulfurization tower and flue gas dedusting, desulfurizing and wastewater treatment process |
| CN112410082A (en) * | 2020-10-30 | 2021-02-26 | 武汉国力通能源环保股份有限公司 | Single-tower desulfurization device and process for low-sulfur-content coal gas based on complex iron catalyst |
| CN114307606A (en) * | 2022-01-13 | 2022-04-12 | 河北中科朗博环保科技有限公司 | SO in sintering flue gas ultralow emission system3Removing device |
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| CN202173875U (en) * | 2011-07-22 | 2012-03-28 | 上海克硫环保科技股份有限公司 | Ammonia flue gas desulfurization device |
| CN202654931U (en) * | 2012-06-29 | 2013-01-09 | 武汉凯迪电力环保有限公司 | Sectional absorption ammonia desulphurization device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202173875U (en) * | 2011-07-22 | 2012-03-28 | 上海克硫环保科技股份有限公司 | Ammonia flue gas desulfurization device |
| CN202654931U (en) * | 2012-06-29 | 2013-01-09 | 武汉凯迪电力环保有限公司 | Sectional absorption ammonia desulphurization device |
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