CN206631430U - Lime stone gypsum wet flue gas desulfurizing device - Google Patents
Lime stone gypsum wet flue gas desulfurizing device Download PDFInfo
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- CN206631430U CN206631430U CN201720257346.9U CN201720257346U CN206631430U CN 206631430 U CN206631430 U CN 206631430U CN 201720257346 U CN201720257346 U CN 201720257346U CN 206631430 U CN206631430 U CN 206631430U
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Abstract
The utility model discloses lime stone gypsum wet flue gas desulfurizing device, prewashing tower is connected by flue with desulfurizing tower, the inside of desulfurizing tower is respectively arranged with demister and ammonia absorbed layer from top to bottom, and ammonia absorbed layer is arranged to two layers of porous plate, including upper strata column plate and descending trays；Demister connects with backwashing pump, ammonia absorbed layer connects with ammonia absorption pump, the top of desulfurizing tower is connected by flue with chimney, the bottom of desulfurizing tower is connected by desulfurizing tower slurry pump with prewashing tower, prewashing tower bottom is connected by prewashing tower slurry pump with centrifuge, centrifuge is connected by screw(-type) feeder with vibration vulcanization bed, vibration vulcanization bed top connection cyclone dust collectors.Compact to design, investment reduction and space, the spraying layer of desulfurizing tower weaken the secondary droplets of flue gas using being arranged above and below；There is no sewage and other waste discharges；The escaping of ammonia is reduced to 2~5 PPM, and its byproduct is ammonium sulfate, can be used as fertilizer.
Description
Technical field
The utility model belongs to flue gas desulfurization device technical field, and in particular to wet desulfurization of flue gas by limestone-gypsum method fills
Put.
Background technology
Flue gas desulfurization (FGD) is industrial trade large-scale application, effective sulfur method.According to sulphur compound absorbent and
The form of byproduct, desulfurization technology can be divided into three kinds of dry method, semidry method and wet method.Dry desulfurizing process is mainly inhaled using solid
Receive the SO in agent removal flue gas2, typically limestone fines are sprayed into burner hearth, it is thermally decomposed into CaO, are absorbed in flue gas
SO2, generate CaSO3, collect in deduster or discharged through chimney together with flying dust.Wet process of FGD is to use liquid-absorbant
Gas liquid reaction under ionic conditions, and then remove the SO in flue gas2, system device therefor is simple, stable and reliable operation, desulfurization
Efficiency high.The great advantage of dry desulfurization is the discharge without waste water, spent acid in administering, and reduces secondary pollution；Shortcoming is desulfurization
Efficiency is low, and equipment is huge.Wet desulphurization uses liquid-absorbant washing flue gas to remove SO2, device therefor is fairly simple, operation
Easily, desulfuration efficiency is high；But flue gas after desulfurization temperature is relatively low, the corrosion of equipment is serious compared with dry method.Existing desulfurizing tower spray effect
Fruit is undesirable, can not be according to SO2Concentration is adjusted, and adds processing cost and processing is incomplete.Because processing is incomplete, meeting
Cause have secondary pollution discharge, and the ammonia content of benefit is higher.Therefore, it is wet how to research and develop a kind of new limestone-gypsum
Method flue gas desulfurization device, has important practical significance.
Utility model content
Asked for the undesirable technology for causing to there is secondary pollution to discharge of desulfurizing tower spraying effect present in prior art
Topic, the purpose of this utility model are to provide wet desulfurization of flue gas by limestone-gypsum method device.
The technical scheme that the utility model is taken is：
Wet desulfurization of flue gas by limestone-gypsum method device, including prewashing tower, prewashing tower oxidation fan, desulfurizing tower, centrifuge,
Screw(-type) feeder, vibration vulcanization bed, cyclone dust collectors, chimney, the prewashing tower are connected by flue with desulfurizing tower, desulfurization
The inside of tower is respectively arranged with demister and ammonia absorbed layer from top to bottom, and ammonia absorbed layer is arranged to two layers of porous plate, upper strata tower
Plate is arranged to the rounding arc of bottom opening, and descending trays are arranged to inverted trapezoidal plate, inverted trapezoidal plate along upper strata column plate is tangent
Side wall equidistantly open up taper hole；Demister connects with backwashing pump, and ammonia absorbed layer connects with ammonia absorption pump, the top of desulfurizing tower
Connected by flue with chimney, the bottom of desulfurizing tower is connected by desulfurizing tower slurry pump with prewashing tower, and prewashing tower bottom leads to
Cross prewashing tower slurry pump to connect with centrifuge, centrifuge is connected by screw(-type) feeder with vibration vulcanization bed, vibration vulcanization bed top
End connection cyclone dust collectors.
Further, the demister is provided with multilayer demisting blade along airintake direction, and every layer of demisting blade is along de-
The central shaft of sulphur tower diametrically flaring annular arrangement set.It is big in high velocity smoke when flue gas flow rate is higher than critical speed
The liquid film of droplet impact accumulated on slates, causes droplet to splash, and the demisting blade of Multi-layers distributing can effectively catch splashing
The droplet that the droplet and high velocity smoke to get up carries, weaken the secondary droplets of flue gas.
Further, the demisting blade is arranged to the hexagonal hollow honeycomb body structure in section, demisting blade edge
It is the air-flow gap that trapezoidal dividing plate is formed longitudinal spaced set, and the both ends of trapezoidal dividing plate are provided with concave shape barb.It is recessed
Font barb and the setting in air-flow gap, from horizontal and longitudinal both direction absorb splash get up droplet, make gas along
From bottom to top, because trapezoidal dividing plate has certain bending degree, during ensure that airflow, water droplet is along wall in air-flow gap
Face flows down, and gas circulates upwards along air-flow gap, can effectively realize gas-liquid separation process.
Further, the hollow position of every layer of demisting blade is provided with supporting plate, and supporting plate is longitudinally equidistantly set
Put to form ridge, pod apertures have been uniformly arranged in supporting plate.Supporting plate serves supporting role, and the pod apertures in supporting plate carry
The high demisting efficiency of board-like demister, ridge structure design can reduce resistance, for flue gas in flue gas desulphurization system and liquid
In the separation of drop.
Further, the sidepiece of the prewashing tower and desulfurizing tower is provided with circulating pump, the both ends pipeline difference of circulating pump
Connect the upper and lower ends in tower body.The deposit of the bottom of prewashing tower and desulfurizing tower is carried out by circulating pump circulating reflux to top
Secondary desulfuration, improve desulfurization degree.
Further, the side wall of the prewashing tower is provided with smoke inlet, and wash spray pipe is provided with the top of prewashing tower,
Wash spray pipe in face of the direction of air-flow, helically arrange by ring-type.
Further, opened up on the lower wall surface of the wash spray pipe in 45° angle between butterfly spray apertures, adjacent spray apertures etc.
Away from arrangement.
The butterfly spray apertures opened up on shower in 45° angle, expand the alternate angle of adjacent two layers shower, lower section spray
Pipe will not overlap mutually to the influence area of the smooth uniformity with top shower to the influence area of the smooth uniformity, so as to improve
The uniformity coefficient of spray, strengthens gas-liquid mixed effect, improves smoke desulfurization efficiency.
Further, the convex surface of the upper strata column plate of the ammonia absorbed layer is met to air-flow, and concave surface is met to spray liquid.Increase gas
Liquid contact area, improve absorbent utilization rate height, adapt to high concentration SO2The desulfurization project of flue gas condition.
The beneficial effects of the utility model are：
Equipment of the present utility model is compact to design, investment reduction and space.Pass through prewashing tower preliminary treatment gas, desulfurizing tower
Interior demister and ammonia absorbent layer structure are novel, and using being arranged above and below, the demisting blade of Multi-layers distributing can effectively be caught spraying layer
The droplet that the droplet to get up and high velocity smoke carry that splashes is caught, weakens the secondary droplets of flue gas；According to SO2Concentration is adjusted
Section, even in SO2In the case of high concentration, processing cost can be also reduced, without sewage and other waste discharges；The escaping of ammonia reduces
To 2~5 PPM.Desulfurization product is discharged into regenerated reactor, and the sodium base desulfurizer regenerated is returned in desulfurizing tower and recycled again, drop
Reduction process cost, its byproduct are ammonium sulfate, can be used as fertilizer.
Brief description of the drawings
Fig. 1 is overall structure diagram of the present utility model.
Fig. 2 is the structural representation of ammonia absorbed layer in the utility model.
Fig. 3 is the structural representation of demister in the utility model.
Fig. 4 is the structural representation of demisting blade in the utility model.
Wherein, 1, prewashing tower；2nd, prewashing tower oxidation fan；3rd, demister；4th, ammonia absorbed layer；5th, desulfurizing tower；6th, prewashing tower
Slurry pump；7th, desulfurizing tower slurry pump；8th, centrifuge；9th, screw(-type) feeder；10th, vulcanization bed is vibrated；11st, cyclone dust collectors；12nd, ammonia
Absorption pump；13rd, backwashing pump；14th, chimney；15th, upper strata column plate；16th, descending trays；17th, demisting blade；18th, supporting plate；19、
Trapezoidal dividing plate.
Embodiment
The utility model is further illustrated below in conjunction with the accompanying drawings.
Lime stone (lime) Wet Flue Gas Desulfurization Technique widely should obtain because absorbent is cheap and easy to get in wet FGD field
With.It is by absorbent reaction mechanism of lime stone：
Absorb：SO2(g)→SO2(L)+H2O→H++HSO3 -→H++SO3 2-
Dissolving：CaCO3(s)+H+→Ca2++HCO3 -
Neutralize：HCO3 -+H+→CO2(g)+H2O
Oxidation：HSO3 -+1/2O2→SO3 2-+H+
SO3 2-+1/2O2→SO4 2-
Crystallization：Ca2++SO3 2-+1/2H2O→CaSO3·1/2H2O(s)
The characteristics of technique be desulfuration efficiency it is high (>95%), absorbent utilization rate it is high (>90%) high concentration SO, is adapted to2
Flue gas condition, calcium sulfur ratio are low (general<1.05), desulfurated plaster can comprehensively utilize.
Process operation reaction principle
Ammonia-sulfuric acid ammonia process is to make absorbent using certain density ammoniacal liquor, and the SO in flue gas is washed in desulfurizing tower2, reach
To the purpose of gas cleaning.By to the NH in absorbing liquid4HSO3It is oxidized to (NH4)2SO4, form the desulfurization pair that can do agricultural fertilizer
Product.The reaction of whole process is as follows：
2NH4OH+SO2=(NH4)2SO3+H2O
(NH4)2SO3+SO2+H2O=2NH4HSO3
NH4HSO3+NH3=(NH4)2SO3
(NH4)2SO3+1/2O2=(NH4)2SO4
Embodiment 1
As depicted in figs. 1 and 2, wet desulfurization of flue gas by limestone-gypsum method device, including prewashing tower, prewashing tower oxidation fan,
Desulfurizing tower, centrifuge, screw(-type) feeder, vibration vulcanization bed, cyclone dust collectors, chimney, the prewashing tower by flue and
Desulfurizing tower connects, and the inside of desulfurizing tower is respectively arranged with demister and ammonia absorbed layer from top to bottom, and ammonia absorbed layer is arranged to two layers
Porous plate, upper strata column plate are arranged to the rounding arc of bottom opening, and descending trays are arranged to down along upper strata column plate is tangent
Trapezoidal plate, the side wall of inverted trapezoidal plate equidistantly open up taper hole；Demister connects with backwashing pump, and ammonia absorbed layer and ammonia absorption pump connect
Connect, the top of desulfurizing tower is connected by flue with chimney, and the bottom of desulfurizing tower is connected by desulfurizing tower slurry pump and prewashing tower
Connect, prewashing tower bottom is connected by prewashing tower slurry pump with centrifuge, and centrifuge is connected by screw(-type) feeder and vibration vulcanization bed
Connect, vibration vulcanization bed top connection cyclone dust collectors.
Carrying out practically process is：Pending flue gas is passed through prewashing tower, ammoniacal liquor or useless ammonia are passed through into desulfurizing tower sidepiece
Circulating pump is squeezed into desulfurizing tower, while process water is driven into the ammonia absorbed layer inside desulfurizing tower by ammonia absorption pump and backwashing pump
In demister, pending flue gas is introduced into prewashing tower, and the shower arranged in prewashing tower by helically ring-type is carried out
Spray, is tentatively removed to the harmful substance in flue gas, prewashing tower bottom liquid again by the circulating pump of sidepiece again
Spray and fall from top, realize the efficiency of preliminary desulfurization；It is passed through by the pretreated flue gas of prewashing tower from the bottom of desulfurizing tower,
Flue gas is during being communicated up, to the SO in gas in ammonia absorbed layer2And related harmful components are absorbed, demister will
The liquid film of big droplet impact accumulated on slates in high velocity smoke, causes droplet to splash, and the demisting blade of Multi-layers distributing can
It is effective to catch the droplet that the droplet to get up and high velocity smoke carry that splashes, weaken the secondary droplets of flue gas.Desulfurization product
It is discharged into regenerated reactor, using Ca (OH)2Solution carries out reducing/regenerating, and the sodium base desulfurizer regenerated is returned in desulfurizing tower again to be circulated
Use, reduce processing cost.Slurry after being handled by desulfurizing tower is pumped into centrifuge by desulfurizing tower plasma discharge, prewashing tower
Slurry after processing is pumped into centrifuge by prewashing tower plasma discharge, and centrifugate enters vibration by screw(-type) feeder and vulcanized
Bed, the solid matter pack after vibration vulcanization bed processing, gas componant are drained into desulfurizing tower by cyclone dust collectors.Desulfurizing tower takes off
Gas after sulphur is discharged in air by chimney.
Embodiment 2
On the basis of embodiment 1, different from embodiment 1, as shown in Figure 3 and Figure 4, demister is set along airintake direction
There is a multilayer demisting blade, the annular arrangement of central shaft of the every layer of demisting blade along desulfurizing tower diametrically flaring is set.In flue gas
When flow velocity is higher than critical speed, the liquid film of the big droplet impact accumulated on slates in high velocity smoke, droplet is caused to splash, and it is more
The demisting blade of layer distribution can effectively catch the droplet that the droplet to get up and high velocity smoke carry that splashes, and weaken flue gas
Secondary droplets.
Demisting blade is arranged to the hexagonal hollow honeycomb body structure in section, and demisting blade is along longitudinal spaced set
The air-flow gap formed for trapezoidal dividing plate, the both ends of trapezoidal dividing plate are provided with concave shape barb.Concave shape barb and air-flow seam
The setting of gap, from horizontal and longitudinal both direction absorb splash get up droplet, make gas along air-flow gap from bottom to top,
Because trapezoidal dividing plate has certain bending degree, during ensure that airflow, water droplet flows down along wall, and gas is along gas
Stream gap is circulated upwards, can effectively realize gas-liquid separation process.
The hollow position of every layer of demisting blade is provided with supporting plate, and supporting plate longitudinal direction spaced set forms ridge, branch
Pod apertures have been uniformly arranged on fagging.Supporting plate serves supporting role, and the pod apertures in supporting plate improve board-like demister
Demisting efficiency, ridge structure design can reduce resistance, in the separation for flue gas in flue gas desulphurization system and drop.
Embodiment 3
On the basis of embodiment 1, different from embodiment 1, the sidepiece of prewashing tower and desulfurizing tower is provided with circulating pump, follows
The both ends pipeline of ring pump is respectively communicated with the upper and lower ends in tower body.The deposit of the bottom of prewashing tower and desulfurizing tower passes through circulating pump
Circulating reflux carries out secondary desulfuration to top, improves desulfurization degree.
The side wall of prewashing tower is provided with smoke inlet, and wash spray pipe is provided with the top of prewashing tower, and wash spray pipe is met
The direction helically ring-type arrangement of air-flow.
Butterfly spray apertures are opened up in 45° angle on the lower wall surface of wash spray pipe, adjacent spray apertures are equidistantly arranged.
The butterfly spray apertures opened up on shower in 45° angle, expand the alternate angle of adjacent two layers shower, lower section spray
Pipe will not overlap mutually to the influence area of the smooth uniformity with top shower to the influence area of the smooth uniformity, so as to improve
The uniformity coefficient of spray, strengthens gas-liquid mixed effect, improves smoke desulfurization efficiency.
The convex surface of the upper strata column plate of ammonia absorbed layer is met to air-flow, and concave surface is met to spray liquid.Gas liquid interfacial area is increased, is carried
It is high that absorbent utilization rate is high, adapts to high concentration SO2The desulfurization project of flue gas condition.
Described above is not to limitation of the present utility model, it should be pointed out that：For the ordinary skill people of the art
For member, on the premise of the utility model in essence scope is not departed from, some variations, modifications, additions or substitutions can also be made,
These improvements and modifications also should be regarded as the scope of protection of the utility model.
Claims (8)
1. wet desulfurization of flue gas by limestone-gypsum method device, it is characterised in that including prewashing tower, prewashing tower oxidation fan, desulfurization
Tower, centrifuge, screw(-type) feeder, vibration vulcanization bed, cyclone dust collectors, chimney, the prewashing tower pass through flue and desulfurization
Tower connects, and the inside of desulfurizing tower is respectively arranged with demister and ammonia absorbed layer from top to bottom, ammonia absorbed layer be arranged to two layers it is porous
Column plate, upper strata column plate are arranged to the rounding arc of bottom opening, and descending trays are arranged to inverted trapezoidal along upper strata column plate is tangent
Plate, the side wall of inverted trapezoidal plate equidistantly open up taper hole；Demister connects with backwashing pump, and ammonia absorbed layer connects with ammonia absorption pump,
The top of desulfurizing tower is connected by flue with chimney, and the bottom of desulfurizing tower is connected by desulfurizing tower slurry pump with prewashing tower,
Prewashing tower bottom is connected by prewashing tower slurry pump with centrifuge, and centrifuge is connected by screw(-type) feeder with vibration vulcanization bed,
Vibrate vulcanization bed top connection cyclone dust collectors.
2. wet desulfurization of flue gas by limestone-gypsum method device according to claim 1, it is characterised in that the demister along
Airintake direction is provided with multilayer demisting blade, the annular arrangement of central shaft of the every layer of demisting blade along desulfurizing tower diametrically flaring
Set.
3. wet desulfurization of flue gas by limestone-gypsum method device according to claim 2, it is characterised in that the demisting blade is set
It is set to the hexagonal hollow honeycomb body structure in section, the gas that demisting blade is formed along longitudinal spaced set for trapezoidal dividing plate
Gap is flowed, the both ends of trapezoidal dividing plate are provided with concave shape barb.
4. wet desulfurization of flue gas by limestone-gypsum method device according to claim 2, it is characterised in that every layer of demisting leaf
The hollow position of piece is provided with supporting plate, and supporting plate longitudinal direction spaced set forms ridge, has been uniformly arranged and led in supporting plate
Discharge orifice.
5. wet desulfurization of flue gas by limestone-gypsum method device according to claim 1, it is characterised in that the prewashing tower and de-
The sidepiece of sulphur tower is provided with circulating pump, and the both ends pipeline of circulating pump is respectively communicated with the upper and lower ends in tower body.
6. wet desulfurization of flue gas by limestone-gypsum method device according to claim 1, it is characterised in that the side of the prewashing tower
Wall is provided with smoke inlet, is provided with wash spray pipe at the top of prewashing tower, wash spray pipe in face of the direction of air-flow helically
Ring-type is arranged.
7. wet desulfurization of flue gas by limestone-gypsum method device according to claim 6, it is characterised in that the wash spray pipe
Lower wall surface in 45° angle open up butterfly spray apertures, adjacent spray apertures are equidistantly arranged.
8. wet desulfurization of flue gas by limestone-gypsum method device according to claim 1, it is characterised in that the ammonia absorbed layer
The convex surface of upper strata column plate is met to air-flow, and concave surface is met to spray liquid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720257346.9U CN206631430U (en) | 2017-03-16 | 2017-03-16 | Lime stone gypsum wet flue gas desulfurizing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720257346.9U CN206631430U (en) | 2017-03-16 | 2017-03-16 | Lime stone gypsum wet flue gas desulfurizing device |
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|---|---|
| CN206631430U true CN206631430U (en) | 2017-11-14 |
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ID=60249587
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| CN201720257346.9U Active CN206631430U (en) | 2017-03-16 | 2017-03-16 | Lime stone gypsum wet flue gas desulfurizing device |
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| CN (1) | CN206631430U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108722380A (en) * | 2018-07-25 | 2018-11-02 | 西安热工研究院有限公司 | A kind of powdery desulphurizing activated coke Analytic Tower and working method |
| CN112999839A (en) * | 2021-03-26 | 2021-06-22 | 四川利弘陶瓷有限公司 | Flue gas desulfurization system of drying tower kiln |
-
2017
- 2017-03-16 CN CN201720257346.9U patent/CN206631430U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108722380A (en) * | 2018-07-25 | 2018-11-02 | 西安热工研究院有限公司 | A kind of powdery desulphurizing activated coke Analytic Tower and working method |
| CN108722380B (en) * | 2018-07-25 | 2024-02-20 | 西安热工研究院有限公司 | Powdery desulfurization active coke analysis tower and working method |
| CN112999839A (en) * | 2021-03-26 | 2021-06-22 | 四川利弘陶瓷有限公司 | Flue gas desulfurization system of drying tower kiln |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220505 Address after: 266000 Weishan community, Liuting street, Chengyang District, Qingdao City, Shandong Province Patentee after: QINGDAO KANGTAI HEAVY INDUSTRY MACHINERY CO.,LTD. Address before: 266000 No. 167, Tianshan 1st Road, Jimo, Qingdao, Shandong Patentee before: QINGDAO GUANTAI ENVIRONMENTAL PROTECTION TECHNOLOGY CO.,LTD. |
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| TR01 | Transfer of patent right |