CN204911215U - Desulfurizing tower that sprays of leading section of spraying - Google Patents

Desulfurizing tower that sprays of leading section of spraying Download PDF

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Publication number
CN204911215U
CN204911215U CN201520465447.6U CN201520465447U CN204911215U CN 204911215 U CN204911215 U CN 204911215U CN 201520465447 U CN201520465447 U CN 201520465447U CN 204911215 U CN204911215 U CN 204911215U
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China
Prior art keywords
spraying
tower
section
spraying section
absorption tower
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CN201520465447.6U
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Chinese (zh)
Inventor
凌斌
许家礼
黄志伟
聂江宁
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JIANGSU LANSHAN ENVIRONMENT TECHNOLOGY Co Ltd
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JIANGSU LANSHAN ENVIRONMENT TECHNOLOGY Co Ltd
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Abstract

The utility model discloses a desulfurizing tower that sprays of leading section of spraying, including the absorption tower, to setting gradually clean exhanst gas outlet down on follow, the defroster, the section of spraying, spray section, former flue and thick liquid distinguish, the spraying section divide into two kinds of designs: scheme no. 1, the annular channel of spraying section sets up in the absorption tower, and atomizing nozzle installs the absorption tower outer wall reaches former flue with top and lateral wall that the spraying section is met and is located, the bottom is shutter baffle structure, scheme no. 2, spraying section are surrounded the setting of absorption tower outer wall, and lateral wall and top wall areal distribution have a plurality of atomizing nozzle of being listed as, and the bottom has a down dip on one side of the tower wall, or is the butterfly plate, communicates with each other through pipeline and tower entoplasm liquid zone. The utility model discloses rapid, the advantages such as the desulfurization is efficient, easy access change of full play spraying desulfurization technique reaction can improve the current desulfurization efficiency that sprays the desulfurizing tower, and simple structure for current spray column transformation does not basically need supporting facility's change.

Description

A kind of spray desulfurizing tower of preposition spraying section
Technical field
The invention belongs to prevention and control of air pollution field, be specially a kind of spray desulfurizing tower of preposition spraying section.
Background technology
As everyone knows, flue gas desulfurization is control SO 2the effective way of pollution and acid rain.In the evolution of flue gas desulfurization technique, spray column is the desulphurization reaction form adopted the earliest, and its advantage to form larger gas liquid interfacial area, and the liquid-gas ratio of simultaneity factor can be less.In order to ensure good desulfurized effect, it is less that slurries spray formation size droplet diameter, then desulfuration efficiency is higher.The size droplet diameter that general spray column produces is more than 1mm, and desulfuration efficiency can reach about 95%, can meet the discharge standard of the 200mg/L comparatively early carried out.But, along with appearance and the enforcement of new discharge standard, existing desulfurizer is difficult to meet the requirement of present stage country to sulfur dioxide emissioning concentration limit value, in order to reach this requirement, save construction cost, way the most economic carries out renovation and improving to existing disengagement section simultaneously.
In prior art, spraying spray desulfurizing tower (publication number: 103908888A) discloses a kind of spraying spray desulfurizing tower.The demist baffle plate that wherein confluxes is tubular, and leave the annular space for flow of flue gas outside baffle plate and between spraying level tower wall, the top of baffle plate tilts to tower wall gradually, connects until top contacts with tower wall.Because the conflux bottom of baffle plate of gas approach end is unlimited, have flue gas escape near the conflux bottom of baffle plate of gas approach end, the flue gas of escape does not contact with the droplet of spraying, and desulfuration efficiency is lower.In addition, interior arrangement and tower wall contact surface little, installation difficulty is comparatively large, is difficult to carry out industrialization promotion.
Summary of the invention
For the problem that the section of spraying desulfuration efficiency in prior art is lower, the invention provides a kind of spray desulfurizing tower of preposition spraying section, concrete scheme is as follows:
The spray desulfurizing tower of preposition spraying section comprises an absorption tower, and absorption tower is followed successively by neat stress outlet from top to bottom, demister, spray section, spraying section, former flue and slurries district.
Described spraying section is divided into two kinds of designs.
Scheme one, spraying section is arranged on above slurries district, and for being arranged at the circular passage in absorption tower, its entrance is communicated with former flue, and flue gas enters spraying section, and annularly vias inner walls detours, and the bottom of circular passage is louver type baffle structure.Described baffle plate and vertical direction angle are 20 ~ 70 °, and in order to reduce the resistance of baffle plate to flue gas, louver type baffle is arranged according to meeting airflow direction, and namely baffle plate upper end tilts to airflow downstream direction.
The feature of spraying section circular passage is also, vias inner walls be eccentric design relative to absorption tower wall, its center of circle away from smoke inlet, close neat stress outlet side.Because porch exhaust gas volumn is comparatively large, the wider reduction cigarette that can be suitable of passage is fast, reduces resistance, along with the cooling of flue gas with from bottom inflow spray section, the exhaust gas volumn of circular passage reduces gradually, passages shrink, velocity of flue gas can keep comparatively stablizing, and the pressure loss can drop to minimum.
Atomizer is arranged on top and the sidewall of absorption tower outer wall and former flue and spraying section joint, after slurries and smoke reaction, from bottom louver type baffle gap location inflow slurries district.
A spray desulfurizing tower for preposition spraying section, is characterised in that the slurries mist droplet particle size that described atomizer sprays is less than 1mm.
Scheme two, spraying section is arranged on above slurries district, absorption tower, for around the circular passage outside absorption tower, its entrance is communicated with former flue, flue gas is divided into two along tower outer wall and detours to former flue opposite place after entering spraying section, flows into the spray section of desulfurizing tower inside from the opening part flue gas tower wall.
The lateral wall of spraying section circular passage and top wall are distributed with some row high-pressure atomization nozzles, in circular passage, spray desulfurization slurry, with smoke reaction, removing SO wherein 2.Have a down dip to Ta Bi side bottom spraying section, or be butterfly plate, and communicated with tower entoplasm liquid zone by pipeline, reacted slurry reflux is to slurries district.
In order to make flue gas be evenly distributed in spraying section, reduce the pressure loss, spraying section entrance and flue gas corner are provided with airflow-distribution board.
A spray desulfurizing tower for improvement, technical scheme can also be: the tower wall week side above slurries district, below spraying layer and between spraying layer arranges atomizer, to fume side to sprinkling desulfurization slurry.Tower wall is arranged atomizer and compensate for short circuit appears in spray process desulfurization shortcoming close to the lower flue gas of tower wall place coverage rate, significantly can improve the desulfuration efficiency of spray column.
Described spray section is provided with many group shower nozzles and sprays downwards above slurries district, and described shower nozzle is connected with slurries district by the pipeline being provided with circulating pump.
The present invention has following beneficial effect: spray technique combines with spraying technique by the present invention, and give full play to the feature that FGD by spraying mist technology specific area is large, be swift in response, desulfuration efficiency is high; The desulfuration efficiency of existing spray desulfurizing tower can be improved; There is not the problem of flue gas short circuit; Nozzle can side direction mounted externally, easy access change; Transform for existing spray column, there is structure simple, feature easy for installation and the absorption tower pressure loss little, substantially do not need the variation of auxiliary facility, the advantages such as improvement cost is lower.
Accompanying drawing explanation
Fig. 1 is: the embodiment of the present invention one spray desulfurizing tower device sectional view.
Wherein: 1-slurries district; The former flue of 2-; 3-sprays section; 4-louver type baffle; 5-atomizer; 6-slurry circulating pump; 7-spray section; 8-demister; 9-neat stress exports.
Fig. 2 is: the embodiment of the present invention one spray desulfurizing tower device spraying section local.
Wherein: the former flue of 2-; 3-sprays section; 4-louver type baffle.
Fig. 3 is: the embodiment of the present invention one spray desulfurizing tower device spraying section top view.
Wherein: the former flue of 2-; 3-sprays section; 4-louver type baffle; 5-atomizer; 9-neat stress exports.
Fig. 4 is: the embodiment of the present invention two spray desulfurizing tower device sectional view.
Wherein: 1-slurries district; The former flue of 2-; 3-sprays section; 4-mozzle; 5-atomizer; 6-slurry circulating pump; 7-spray section; 8-demister; 9-neat stress exports; 11-airflow-distribution board; 12-mozzle.
Fig. 5 is: the embodiment of the present invention two spray desulfurizing tower device spraying section local.
Wherein: the former flue of 2-; 3-sprays section; 10-passage; 11-airflow-distribution board.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, concrete elaboration is made to the present invention.
Embodiment one: as shown in Figure 1, Figure 2, tower internal spraying section 3 is established above desulfuration absorbing tower slurries district 1, form circular passage by top, inner side baffle and desulfurizing tower wall, below spraying section 3, establish multi-disc louver type baffle 4, the absorption tower wall of spraying section 3 is provided with some row atomizers 5.Spray section 7, demister 8 and neat stress outlet 9 is followed successively by above spraying section 3.
Neat stress outlet 9 is vertical with former flue 2 direction, and spraying section 3 inner side baffle is relative to the eccentric design of absorption tower wall, and as Fig. 3, ring-shaped flue width is from porch convergent, and in ring-shaped flue, flue gas flow rate is stablized, and can reduce the pressure loss of tower.
Flue gas to be administered enters spraying section 3 by former flue 2, and the desulfurization slurry droplet sprayed with atomizer 5 in the process flowed in circular passage reacts, and removes part SO 2rear flue gas imports center, absorption tower from louver type baffle 4 gap location, continues up, with spray section 7 slurry reaction.Neat stress outlet 9 is entered after flue gas after the process of spraying spray removes droplet.
The mist droplet particle size sprayed due to spraying section 3 is very little, particle diameter is approximately 0.01 ~ 0.1mm, therefore section 3 of spraying has higher reaction rate and desulfuration efficiency, louver type baffle 4 can reduce flue gas to a certain extent and escape in the short circuit of spraying section 3, and section 3 slurries of simultaneously spraying can flow into slurries district 1 by louver type baffle 4 and recycle.
After flowing through the spraying section 3 of this kind of structure, concentrate on desulfurizing tower center when flue gas is up, this can effectively be avoided because spray section 7 is lower close to tower wall place coverage rate, thus causes the problem of flue gas short circuit, improves the efficiency of spray section 7.
Transform example as with certain coal-fired boiler in power plant desulfurizer domestic, retain 2,3,4 layers of former spraying layer, this desulfuration efficiency of 3 layers about about 90% ~ 95%, former spraying layer 1 layer changes spraying section 3 into, this place's efficiency can reach 50% ~ 80%, and overall desulfuration efficiency can reach about 99%, meets 35mg/Nm 3discharge standard.
Described spray section 7 is provided with many group shower nozzles and sprays downwards above slurries district 1, and described shower nozzle is connected with slurries district 1 by the pipeline being provided with slurry circulating pump 6.
Embodiment two: as Fig. 4, Fig. 5, tower external spraying section 3 is established above desulfuration absorbing tower slurries district 1, circular passage is formed by top, outer side shield and desulfurizing tower wall, bottom is the anti-deposition plate of butterfly, the one end be connected with tower wall is lower than the one end be connected with outer side shield, and butterfly plate and the minimum point of Ta Bi junction are provided with and the mozzle 12 be communicated with in tower.Spraying section 3 entrance and former flue 2 joint are provided with airflow-distribution board 11, make smoke distribution even.
Spraying section 3 is pushed up, outer side shield is provided with some row atomizers 5.Spray section 7, demister 8 and neat stress outlet 9 is followed successively by above spraying section 3.
Former flue gas to be administered enters spraying section 3 circular passage from former flue 2, be divided into two strands from both sides annularly flue detour, and to react with the slurries droplet that atomizer 5 sprays.Circular passage has path 10 on the opposite side tower wall just right with former flue 2, is communicated with in tower, and two strands of flue gases converge in inflow tower herein, enter spray section 7.Spraying section 3 slurries flow back to slurries district 1 by bottom mozzle 12.
Substantially be in sealing state bottom the spraying section 3 of this kind of structure, flue gas short circuit escape amount greatly reduces, and therefore nebulization efficiency can reach 90%, and spray section 7 efficiency about 90% ~ 95%, overall efficiency can reach more than 99%, meets 35mg/Nm 3discharge standard.
Embodiment three: atomizer 5 is established in the tower wall week side below spray section 7 and between spraying layer, improves desulfuration efficiency.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all within the present invention's spirit and principle, any amendment made, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (6)

1. a spray desulfurizing tower for preposition spraying section, comprises absorption tower, it is characterized in that: described absorption tower is followed successively by neat stress outlet from top to bottom, demister, spray section, spraying section, former flue and slurries district;
Described spraying section is arranged on above described slurries district, comprise the circular passage be arranged in absorption tower, described circular passage entrance is communicated with former flue, atomizer is arranged on top and the sidewall of described absorption tower outer wall and described former flue and described spraying section joint, and bottom is louver type baffle structure.
2. a spray desulfurizing tower for preposition spraying section, comprises absorption tower, it is characterized in that: described absorption tower is followed successively by neat stress outlet from top to bottom, demister, spray section, spraying section, former flue and slurries district;
Described spraying section is arranged on above described slurries district, comprise around the circular passage outside described absorption tower, described circular passage entrance is communicated with former flue, and be communicated with described absorption tower by the opening on tower wall, lateral wall and top wall are distributed with some row atomizers, and bottom is communicated with tower entoplasm liquid zone by pipeline.
3. the spray desulfurizing tower of preposition spraying section according to claim 1, is characterized in that: described louver type baffle and vertical direction angle are 20 ~ 70 °, and arrange according to meeting airflow direction, namely baffle plate upper end tilts to airflow downstream direction; The inwall of described circular passage is eccentric design relative to absorption tower wall, and its center of circle is away from described former flue side.
4. the spray desulfurizing tower of preposition spraying section according to claim 2, is characterized in that: porch, described circular passage is provided with airflow-distribution board, and bottom has a down dip to Ta Bi side, or is butterfly plate.
5. the spray desulfurizing tower of preposition spraying section according to claim 1 and 2, is characterized in that: the slurries mist droplet particle size that described atomizer sprays is less than 1mm.
6. the spray desulfurizing tower of preposition spraying section according to claim 1 and 2, is characterized in that: the tower wall week side above slurries district, below spraying layer and between spraying layer arranges atomizer, and described atomizer is arranged on Ta Bishang.
CN201520465447.6U 2015-07-01 2015-07-01 Desulfurizing tower that sprays of leading section of spraying Active CN204911215U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104941437A (en) * 2015-07-01 2015-09-30 江苏揽山环境科技有限公司 Spraying desulfurizing tower with front-mounted atomizing section

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104941437A (en) * 2015-07-01 2015-09-30 江苏揽山环境科技有限公司 Spraying desulfurizing tower with front-mounted atomizing section

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