CN204933240U - Double tower Two-way Cycle Wet Limestone Desulfurization treatment system - Google Patents
Double tower Two-way Cycle Wet Limestone Desulfurization treatment system Download PDFInfo
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- CN204933240U CN204933240U CN201520667120.7U CN201520667120U CN204933240U CN 204933240 U CN204933240 U CN 204933240U CN 201520667120 U CN201520667120 U CN 201520667120U CN 204933240 U CN204933240 U CN 204933240U
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Abstract
The utility model relates to fume treatment field, discloses a kind of double tower Two-way Cycle Wet Limestone Desulfurization treatment system.The utility model first flue connects the import of A adsorption tower smoke, the outlet of A adsorption tower smoke is by the second flue and B adsorption tower smoke inlet communication, the outlet of B adsorption tower smoke connects discharge flue, the inner epimere in absorption tower is disposed with demister and spraying layer from top to bottom, hypomere is provided with slurry pool, serum storage tank is communicated with the injection point on absorption tower by slush pump, oxidation fan is connected with the air jet pipe on absorption tower by air duct, serum outlet is communicated with the shower of spraying layer by slurry circulating pump, first gypsum outlet is communicated with by the inlet of pipeline with gypsum cyclone, the precipitation outlet of gypsum cyclone is communicated with vacuum belt dewaterer by pipeline, second gypsum outlet is communicated with bottom A absorption tower by forced circulation pump.The utility model desulfuration efficiency is high, and structure control is flexible, and applied widely, cost performance is high.
Description
Technical field
The utility model relates to fume treatment field, particularly relates to a kind of double tower Two-way Cycle Wet Limestone Desulfurization treatment system.
Background technology
Existing flue gas desulfurization technique is divided into dry desulfurization and wet desulphurization substantially, and due to dry desulfurization inefficiency, operating process is complicated, and product utilization difficulty is comparatively large, so the application of wet desulphurization is more extensive.The flue gas desulfur device of existing steam power plant generally adopts the working method of first grade absorption tower, and flue gas directly enters in absorption tower, reacts with the lime stone slurry sprayed out in tower, the SO in flue gas
2, SO
3and HCL, HF are absorbed, SO
2the oxidation of absorption product and the neutralization reaction zoneofoxidation bottom absorption tower completes and finally forms gypsum byproduct, because flue gas is continuous generation, and reaction only just can occur when flue gas contacts with lime stone slurry, mostly be in prior art to arrange multiple spraying layer in absorption tower, to improve contact probability and the reaction effect of flue gas and lime stone slurry, but it is higher for concentration, flow velocity is flue gas faster, still effectively cannot improve the desulfuration efficiency of equipment, often need to set up other auxiliary equipment, add operation and maintenance cost, expand floor space, increase operation easier, desulfuration efficiency is by restriction to a certain extent simultaneously, be difficult to reach more than 90-95%.Therefore, design a kind of structure simple, easy and simple to handle, the desulfurizer that desulfuration efficiency is high seems particularly important.
Utility model content
The technical problems to be solved in the utility model is to provide the double tower Two-way Cycle Wet Limestone Desulfurization treatment system that a kind of structure is simple, easy and simple to handle, desulfuration efficiency is high.
For solving the problems of the technologies described above, the utility model adopts following technical scheme:
The utility model double tower Two-way Cycle Wet Limestone Desulfurization treatment system, comprise serum storage tank, the first oxidation fan, the second oxidation fan, A absorption tower, B absorption tower, gypsum cyclone and vacuum belt dewaterer, first flue connects the gas approach on A absorption tower, the exhanst gas outlet on A absorption tower is communicated with the gas approach on B absorption tower by the second flue, and the exhanst gas outlet on B absorption tower directly connects discharge flue;
Described A absorption tower comprises the first air jet pipe, first spraying layer, first demister, first injection point, first serum outlet, first slurry circulating pump, first gypsum outlet and the first filter, the inner epimere in described A absorption tower is disposed with the first demister and the first spraying layer from top to bottom, hypomere is provided with the first slurry pool, serum storage tank is communicated with first injection point on A absorption tower by slush pump, first oxidation fan is connected with first air jet pipe on A absorption tower by air duct, first serum outlet is communicated with the shower of the first spraying layer by the first slurry circulating pump, the first filter is fixed with inside first serum outlet, first gypsum outlet is communicated with by the inlet of pipeline with gypsum cyclone, the precipitation outlet of gypsum cyclone is communicated with vacuum belt dewaterer by pipeline,
Described B absorption tower comprises the second air jet pipe, second spraying layer, second demister, second injection point, second serum outlet, second slurry circulating pump, second gypsum outlet, second filter and forced circulation pump, the inner epimere in described B absorption tower is disposed with the second demister and the second spraying layer from top to bottom, hypomere is provided with the second slurry pool, serum storage tank is communicated with second injection point on B absorption tower by slush pump, second oxidation fan is connected with second air jet pipe on B absorption tower, second serum outlet is communicated with the shower of the second spraying layer by the second slurry circulating pump, the second filter is fixed with inside second serum outlet, second gypsum outlet is communicated with bottom A absorption tower by forced circulation pump.
The utility model double tower Two-way Cycle Wet Limestone Desulfurization treatment system, further, described first air jet pipe and the second air jet pipe, all in pipe net distribution, the first air jet pipe and the second air jet pipe evenly offer multiple steam vent.
The utility model double tower Two-way Cycle Wet Limestone Desulfurization treatment system, further, described first spraying layer comprises 4 layers of spraying net, and the second spraying layer comprises 3 layers of spraying net.
The utility model double tower Two-way Cycle Wet Limestone Desulfurization treatment system, further, described first demister is individual layer ridge-roof type demist baffle plate, and the second demister is two-tier rhombic demist baffle plate.
The utility model double tower Two-way Cycle Wet Limestone Desulfurization treatment system, further, first, second filter described is respectively the first filter bowl and the second filter bowl, first, second filter bowl described is evenly distributed with multiple through hole, aperture is 10-20mm, and the first filter bowl and the second filter bowl are fixed with demountable structure respectively.
The utility model double tower Two-way Cycle Wet Limestone Desulfurization treatment system, further, described first filter bowl and the second filter bowl adopt 1.4529 alloy steel materials to make.
The utility model double tower Two-way Cycle Wet Limestone Desulfurization treatment system, further, also comprise the first agitating device and the second agitating device, described first agitating device is communicated with by the bottom of pipeline with A absorption tower, and described second agitating device is communicated with by the bottom of pipeline with B absorption tower.
The utility model double tower Two-way Cycle Wet Limestone Desulfurization treatment system, further, first, second agitating device described is pulse suspension pump or side agitator.
The utility model double tower Two-way Cycle Wet Limestone Desulfurization treatment system compared with prior art, has following beneficial effect:
The utility model adopts the series connection of two-stage absorption tower to use, and utilizes desulfurizing agent CaCO
3sulfide in flue gas absorbs by slurries, neutralization, and is aided with air and is oxidized, and final crystallization generates gypsum CaSO
42H
2o accessory substance, flue gas is continuously across twice CaCO
3slurry wash, twice sulfide removal efficiency superposition, up to 99.9%, can effectively raise desulfuration efficiency, the reduction of discharging achieving sulfide and the object purified air.
Air jet pipe in absorption tower is set to ductwork type, air jet pipe evenly arranges multiple steam vent, compared with general spray gun, the air that oxidation fan is introduced enters in slurry pool more uniformly, slurry is fully contacted with oxygen, it is more thoroughly rapid that oxidation reaction is carried out, not only decrease the time of repose of feed liquid in slurry pool, improve the oxidation efficiency of feed liquid, effectively save energy resource, and improve the quality of accessory substance, the gypsum byproduct free radical moisture of gained lower than 10% (percetage by weight), CaSO
42H
2o content, higher than 90%, is dissolved in the Cl in gypsum
-content, lower than 0.01% (percetage by weight, using the gypsum without free moisture as benchmark), is dissolved in the F in gypsum
-content is lower than 0.01% (percetage by weight, using the gypsum without free moisture as benchmark).
Because material liquid component is complicated in the slurry pool on absorption tower, grain diameter is not of uniform size, serum outlet is sentenced demountable structure and is fixedly installed filter bowl, filter bowl is evenly provided with multiple through hole, aperture is 10-20mm, can particle diameter is larger in elimination feed liquid impurity, prevent from blocking slurry circulating pump, the safety of effective safeguards system and continuous service, if desired, filter bowl can be changed, reusable after rinsing, continuous running that is economic, convenient, not influential system, reduces maintenance and the operating cost of equipment.
In two absorption towers, spraying layer and demister are in structure with quantitatively distinguish setting, and arrange 4 layers of spraying layer and 1 layer of ridge-roof type demist baffle plate in A absorption tower, flue gas desulphuization rate can reach more than 95%, and nozzle coverage rate is up to more than 200%; 3 layers of spraying layer and 2 layers of rhombus demist baffle plate are set in B absorption tower, because sulfur content greatly reduces in the flue gas of one-level washing, therefore decrease the quantity of spraying layer, save cost, because the flue gas purified through secondary washing directly enters air, therefore change the shape of demist baffle plate, improve demisting efficiency, make finally to discharge flue gas and reach discharge standard.Two absorption towers are independently arranged, cyclic process in each absorption tower is also independent control, avoid the mutual restriction between the setting of tower inner structure and state modulator, be easy to optimize and rapid adjustment, coal type change and load variations can be adapted to fast, make the smoke condition that reaction and sweetening process gear to actual circumstances more, make course of reaction more optimize with changeable, equipment is reliable, and cost performance is high, adaptive faculty is strong, applied widely.
Below in conjunction with accompanying drawing, double tower Two-way Cycle Wet Limestone Desulfurization treatment system of the present utility model is described further.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model double tower Two-way Cycle Wet Limestone Desulfurization treatment system;
Fig. 2 is the top view of the first air jet pipe.
Detailed description of the invention
As shown in Figure 1, the utility model double tower Two-way Cycle Wet Limestone Desulfurization treatment system comprises serum storage tank 1, first oxidation fan 41, second oxidation fan 42, A absorption tower 2, B absorption tower 3, gypsum cyclone 7 and vacuum belt dewaterer 8, first flue 61 connects the gas approach 21 on A absorption tower, the exhanst gas outlet 22 on A absorption tower is communicated with the gas approach 31 on B absorption tower by the second flue 62, and the exhanst gas outlet 32 on B absorption tower directly connects discharge flue 63.
A absorption tower 2 comprises the first air jet pipe 23, first spraying layer 24, first demister 25, first injection point 281, first serum outlet 282, first slurry circulating pump 261, first filter 262, first gypsum outlet 29, first agitating device 51 and backwater entrance 291, the inner epimere in A absorption tower is disposed with the first demister 25 and the first spraying layer 24 from top to bottom, hypomere is provided with the first slurry pool 27, first demister 25 is individual layer ridge-roof type demist baffle plate, first spraying layer 24 comprises 4 layers of spraying net, serum storage tank 1 is communicated with first injection point 281 on A absorption tower by slush pump 11, first oxidation fan 41 is connected with first air jet pipe 23 on A absorption tower by air duct 64, as shown in Figure 2, first air jet pipe 23 is in pipe net distribution, first air jet pipe 23 evenly offers multiple steam vent 231, first serum outlet 282 is communicated with the shower of the first spraying layer 24 by the first slurry circulating pump 261, the first filter 262 is fixed with demountable structure inside first serum outlet 282, first filter 262 is the first filter bowl, first filter bowl is distributed with multiple through hole, aperture is 15mm, first filter bowl adopts 1.4529 alloy steel materials to make, first gypsum outlet 29 is communicated with by the inlet of pipeline with gypsum cyclone 7, the precipitation outlet of gypsum cyclone 7 is communicated with vacuum belt dewaterer 8 by pipeline, the upper liquid outlet of gypsum cyclone 7 is connected with the backwater entrance 291 on A absorption tower by pipeline, first agitating device 51 is communicated with by the bottom of pipeline with A absorption tower 2, first agitating device 51 can select pulse suspension pump, pulse suspension pump is shown in Fig. 1, also other agitating devices conventional in this area can be selected, as side agitator.
B absorption tower 3 comprises the second air jet pipe 33, second spraying layer 34, second demister 35, second injection point 381, second serum outlet 382, second slurry circulating pump 361, second filter 362, second gypsum outlet 39, second agitating device 52 and forced circulation pump 65, the inner epimere in B absorption tower is disposed with the second demister 35 and the second spraying layer 34 from top to bottom, hypomere is provided with the second slurry pool 37, second demister 35 is two-tier rhombic demist baffle plate, second spraying layer 34 comprises 3 layers of spraying net, serum storage tank 1 is communicated with second injection point 381 on B absorption tower by slush pump 11, second oxidation fan 42 is connected with second air jet pipe 33 on B absorption tower, second air jet pipe 33 is in pipe net distribution, identical with the first air jet pipe 23 structure, second air jet pipe 33 evenly offers multiple steam vent, second serum outlet 382 is communicated with the shower of the second spraying layer 34 by the second slurry circulating pump 361, the second filter 362 is fixed with demountable structure inside second serum outlet 382, second filter 362 is the second filter bowl, second filter bowl is distributed with multiple through hole, aperture is 15mm, second filter bowl adopts 1.4529 alloy steel materials to make, second gypsum outlet 39 is communicated with bottom A absorption tower by forced circulation pump 65, second agitating device 52 is communicated with by the bottom of pipeline with B absorption tower 3, second agitating device 52 is communicated with by the bottom of pipeline with B absorption tower 3, second agitating device 52 can select pulse suspension pump, pulse suspension pump is shown in Fig. 1, also other agitating devices conventional in this area can be selected, as side agitator.
The specific works process of the utility model double tower Two-way Cycle Wet Limestone Desulfurization treatment system is as follows:
Slush pump 11 is by fresh CaCO
3slurries pump in the slurry pool 27 on A absorption tower 2, deliver in the shower of the first spraying layer 24 through the first slurry circulating pump 261 after slurries filter the larger impurity of particle by the first filter bowl, pending flue gas enters A absorption tower 2 by the first flue 61, flue gas and the first spraying layer 24 spray and under CaCO
3slurries directly contact, and the sulfide in flue gas is by CaCO
3slurries absorb, the H that major part generates
2sO
3and H
2sO
4, fall into the first slurry pool 27, mix under the stirring of the first agitating device 51, with CaCO
3there is neutralization reaction, generate CaSO
3and CaSO
4; Air blasts in the first slurry pool 27 by the first oxidation fan 41, impels generation oxidation reaction, generates most CaSO
4, and crystallization forms CaSO
42H
2o; Mixed serum again pumps into spraying layer by the first slurry circulating pump 261 and forms continuous print serum recycle after the first filter bowl filters, and circulate 4-5 time in A absorption tower 2, the reaction time controls at about 5min; In A absorption tower, in flue gas, the sulfide of about more than 95% can be removed.
Flue gas after once washing is sent in B absorption tower 3 by the second flue 62 after the first demister 25 removes larger particles drop, fresh CaCO3 slurries pump in B absorption tower 3 by slush pump 11, deliver in the shower of the second spraying layer 34 through the second slurry circulating pump 361 after slurries filter the larger impurity of particle by the second filter bowl, the second slurry pool 37 is fallen into the smoke contacts after once washing, mixed serum continuous circulation spray 4-5 time, air blasts in the second slurry pool 37 by the second oxidation fan 42, mix under the stirring of the second agitating device 52, complete the absorption of sulfide, neutralization, oxidation and crystallization process.The gypsum CaSO formed in B absorption tower 3
42H
2o amount is considerably less, and it sends in A absorption tower 2 by forced circulation pump 65, with the CaSO generated in A absorption tower 2
42H
2o mixes, and sends in gypsum cyclone 7 together, and dry by vacuum belt dewaterer 8, obtains gypsum byproduct.Directly enter air by discharge flue 63 after flue gas after secondary washing removes large drop by the second demister 35, the flue gas desulphuization rate after secondary washing can up to 99.9%.
Above-described embodiment is only be described preferred embodiment of the present utility model; not scope of the present utility model is limited; under the prerequisite not departing from the utility model design spirit; the various distortion that those of ordinary skill in the art make the technical solution of the utility model and improvement, all should fall in protection domain that the utility model claims determine.
Claims (8)
1. double tower Two-way Cycle Wet Limestone Desulfurization treatment system, comprise serum storage tank, the first oxidation fan, the second oxidation fan, A absorption tower, B absorption tower, gypsum cyclone and vacuum belt dewaterer, first flue connects the gas approach on A absorption tower, the exhanst gas outlet on A absorption tower is communicated with the gas approach on B absorption tower by the second flue, the exhanst gas outlet on B absorption tower directly connects discharge flue, it is characterized in that:
Described A absorption tower comprises the first air jet pipe, first spraying layer, first demister, first injection point, first serum outlet, first slurry circulating pump, first gypsum outlet and the first filter, the inner epimere in described A absorption tower is disposed with the first demister and the first spraying layer from top to bottom, hypomere is provided with the first slurry pool, serum storage tank is communicated with first injection point on A absorption tower by slush pump, first oxidation fan is connected with first air jet pipe on A absorption tower by air duct, first serum outlet is communicated with the shower of the first spraying layer by the first slurry circulating pump, the first filter is fixed with inside first serum outlet, first gypsum outlet is communicated with by the inlet of pipeline with gypsum cyclone, the precipitation outlet of gypsum cyclone is communicated with vacuum belt dewaterer by pipeline,
Described B absorption tower comprises the second air jet pipe, second spraying layer, second demister, second injection point, second serum outlet, second slurry circulating pump, second gypsum outlet, second filter and forced circulation pump, the inner epimere in described B absorption tower is disposed with the second demister and the second spraying layer from top to bottom, hypomere is provided with the second slurry pool, serum storage tank is communicated with second injection point on B absorption tower by slush pump, second oxidation fan is connected with second air jet pipe on B absorption tower, second serum outlet is communicated with the shower of the second spraying layer by the second slurry circulating pump, the second filter is fixed with inside second serum outlet, second gypsum outlet is communicated with bottom A absorption tower by forced circulation pump.
2. double tower Two-way Cycle Wet Limestone Desulfurization treatment system according to claim 1, is characterized in that: described first air jet pipe and the second air jet pipe, all in pipe net distribution, the first air jet pipe and the second air jet pipe evenly offer multiple steam vent.
3. double tower Two-way Cycle Wet Limestone Desulfurization treatment system according to claim 1, it is characterized in that: described first spraying layer comprises 4 layers of spraying net, the second spraying layer comprises 3 layers of spraying net.
4. double tower Two-way Cycle Wet Limestone Desulfurization treatment system according to claim 1, is characterized in that: described first demister is individual layer ridge-roof type demist baffle plate, and the second demister is two-tier rhombic demist baffle plate.
5. double tower Two-way Cycle Wet Limestone Desulfurization treatment system according to claim 1, it is characterized in that: first, second filter described is respectively the first filter bowl and the second filter bowl, first, second filter bowl described is evenly distributed with multiple through hole, aperture is 10-20mm, and the first filter bowl and the second filter bowl are fixed with demountable structure respectively.
6. double tower Two-way Cycle Wet Limestone Desulfurization treatment system according to claim 5, is characterized in that: described first filter bowl and the second filter bowl adopt 1.4529 alloy steel materials to make.
7. double tower Two-way Cycle Wet Limestone Desulfurization treatment system according to claim 1, it is characterized in that: also comprise the first agitating device and the second agitating device, described first agitating device is communicated with by the bottom of pipeline with A absorption tower, and described second agitating device is communicated with by the bottom of pipeline with B absorption tower.
8. double tower Two-way Cycle Wet Limestone Desulfurization treatment system according to claim 7, is characterized in that: first, second agitating device described is pulse suspension pump or side agitator.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105709585A (en) * | 2016-01-27 | 2016-06-29 | 广西博世科环保科技股份有限公司 | Double-tower efficient wet desulphurization device |
| CN106039974A (en) * | 2016-07-07 | 2016-10-26 | 江苏峰业科技环保集团股份有限公司 | Twin-tower dual-area desulfurizer |
| CN107742023A (en) * | 2017-10-13 | 2018-02-27 | 国网河北能源技术服务有限公司 | The modeling method of double tower double-cycle process wet method fume desulfurizing system running optimizatin control |
| CN108434960A (en) * | 2018-03-23 | 2018-08-24 | 东南大学 | A kind of devices and methods therefor promoting double tower Two-way Cycle wet desulfurization system removing fine particle and sulfur trioxide acid mist |
| CN110270211A (en) * | 2019-03-25 | 2019-09-24 | 上海电气电站环保工程有限公司 | A kind of double-stage desulfurizing tower |
-
2015
- 2015-08-31 CN CN201520667120.7U patent/CN204933240U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105709585A (en) * | 2016-01-27 | 2016-06-29 | 广西博世科环保科技股份有限公司 | Double-tower efficient wet desulphurization device |
| CN105709585B (en) * | 2016-01-27 | 2018-09-28 | 广西博世科环保科技股份有限公司 | A kind of double tower high-efficiency wet-desulfurizing device |
| CN106039974A (en) * | 2016-07-07 | 2016-10-26 | 江苏峰业科技环保集团股份有限公司 | Twin-tower dual-area desulfurizer |
| CN107742023A (en) * | 2017-10-13 | 2018-02-27 | 国网河北能源技术服务有限公司 | The modeling method of double tower double-cycle process wet method fume desulfurizing system running optimizatin control |
| CN108434960A (en) * | 2018-03-23 | 2018-08-24 | 东南大学 | A kind of devices and methods therefor promoting double tower Two-way Cycle wet desulfurization system removing fine particle and sulfur trioxide acid mist |
| CN110270211A (en) * | 2019-03-25 | 2019-09-24 | 上海电气电站环保工程有限公司 | A kind of double-stage desulfurizing tower |
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