CN102728199A - Method and apparatus capable of effectively reducing production of ammonium sulfate particles in ammonia desulphurization - Google Patents
Method and apparatus capable of effectively reducing production of ammonium sulfate particles in ammonia desulphurization Download PDFInfo
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- CN102728199A CN102728199A CN2012102192647A CN201210219264A CN102728199A CN 102728199 A CN102728199 A CN 102728199A CN 2012102192647 A CN2012102192647 A CN 2012102192647A CN 201210219264 A CN201210219264 A CN 201210219264A CN 102728199 A CN102728199 A CN 102728199A
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Abstract
The invention relates to a method and an apparatus capable of effectively reducing production of ammonium sulfate particles in ammonia desulphurization. Sulfur-containing flue gas enters into a desulphurization absorbing tower from a central inlet flue of the desulphurization absorbing tower, and purified flue gas having passed through a spraying layer and a packing layer is discharged from an outlet flue. The invention has the following characteristics: a spraying cooling device is arranged at the inlet flue of the desulphurization absorbing tower, which enables the temperature of flue gas at an inlet of the absorbing tower to be effectively decreased and discharge of ammonium sulfate particles to be controlled at the source, thereby effectively reducing the content of ammonium sulfate dust particles in discharged purified flue gas; and the spraying cooling device sprays an ammonium sulfate solution with a concentration of 5 to 30% or water onto flue gas at the inlet. According to the invention, the output of the desulphurization byproduct ammonium sulfate can be effectively increased, and discharge of ammonium sulfate dust particles flowing out with flue gas into atmosphere is reduced, thereby reducing secondary environmental pollution.
Description
Technical field
The present invention relates to the method and apparatus that the ammonium sulfate thing generates in a kind of effective reduction ammonia process of desulfurization, relate in particular to the flue gas ammonia method desulfurizing technology, be applied to entrance of flue gas-desulfurizing absorption tower, 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 the flue gas as raw material has been widely used in the flue gas desulfurization project of electric power, metallurgy and chemical field.
At present the ammonia-process desulfurization technique ubiquity of main flow discharges the problem of ammonium sulfate dust granules too high levels in the clean flue gas, and many devices discharge that ammonium sulfate dust granules content has surpassed 200 mg/Nm in the clean flue gas
3, even partial devices has surpassed 1000mg/Nm
3More than.Discharge the ammonium sulfate, the ammonium sulfite particle that generate in soot dust granule that dust granules in the clean flue gas comprises that boiler brings and the sweetening process.The soot dust granule that boiler brings mainly captures, removes by the dust removal installation that is arranged on behind the boiler, and the method that adopts at present mainly contains electric precipitation, bag dedusting, the dedusting of electricity bag etc., and the present invention does not relate to this partial content.
The ammonium sulfate that generates in the sweetening process, ammonium sulfite particle mainly are made up of 3 parts: the ammonium sulfate, the ammonium sulfite particle that carry in the drop in a. discharging flue gas; B. SO in the sweetening process
3, SO
2With the NH that escapes
3The aerosol particle that reaction generates; C. the ammonium sulfate solids dust granules that produces in the sweetening process.What wherein have the greatest impact is the ammonium sulfate solids dust granules that produces in the sweetening process; The desulfuration absorbing tower entrance flue gas temperature is usually at 110 ~ 150 ℃; When this flue gas with contain solid particulate matter supersaturation ammonium sulfate slurries or saturated ammonium sulfate solution (even near saturated ammonium sulfate solution) when contacting, huge exhaust gas volumn is evaporated the moisture in the ammonium sulfate droplet of dispersion rapidly, follows this evaporation process; A large amount of ammonium sulfate fine particle things have generated, and are similar to spray-drying process.The diameter of these particles basically all is a submicron order; It is all very limited that the spraying layer of follow-up desulfurizing tower or packing layer remove effect to the washing of these fine drop; Therefore these particles that are not removed are carried by flue gas and enter atmosphere, cause byproduct of ammonium sulfate output to descend, and cause economic loss; After the ammonium sulfate dust granules thing of taking out of in company with flue gas simultaneously enters atmosphere, environment is caused secondary pollution.The test result of laboratory experiment and practical sulphur removal device contrast operation has all proved this point.
Summary of the invention
The technical problem that the present invention will solve is: overcome the shortcoming that generates the ammonium sulfate solids dust granules in traditional sweetening process easily; The method and apparatus that the ammonium sulfate thing generates in a kind of effective reduction ammonia process of desulfurization is provided; Can effectively improve desulfuration byproduct ammonium sulfate output; Reduce the ammonium sulfate dust granules thing of taking out of in company with flue gas simultaneously and enter atmosphere, the secondary pollution environment.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is:
The method that the ammonium sulfate thing generates in a kind of effective reduction ammonia process of desulfurization, sulfur-containing smoke gas gets into desulfuration absorbing tower from the centre entrance flue of desulfuration absorbing tower, discharges from exhaust pass through the clean flue gas of spraying layer and packing layer; It is characterized in that: the gas approach place at desulfuration absorbing tower is provided with the spraying cooling device, effectively reduces the absorption tower entrance flue gas temperature, the discharging of control ammonium sulfate thing from the source, thus effectively reduce the content that discharges ammonium sulfate dust granules in the clean flue gas; Described spraying cooling device sprays 5% ~ 30% ammonium sulfate or water to inlet flue gas.
By technique scheme, one group or several groups of atomizing spray heat sinks are set on the desulfurizing tower gas approach, the absorption tower entrance flue gas temperature is reduced to 80 ~ 110 ℃.
By technique scheme, the spraying cooling agent of spraying cooling device gets into the spray circulating tank outside the absorption tower after reclaiming, and after the spray circulating pump boosts, gets into the spraying cooling device again.
By technique scheme, the spraying cooling device is provided with atomizer; A plurality of atomizers are spaced apart in groups.
The device that the ammonium sulfate thing generates in a kind of effective reduction ammonia process of desulfurization comprises the absorption tower that is used for desulfurization, the middle part inlet porting flue of tower, and the top of tower is provided with exhaust pass; It is characterized in that: the spraying cooling device is set on gas approach, described spraying cooling device be used for the spray circulating pump that cooling agent boosts and link to each other; Cooling agent is 5% ~ 30% ammonium sulfate or water.
By technique scheme, the spraying cooling agent recovery channel on absorption tower links to each other with the spray circulating pump through the spray circulating tank, and directly links to each other with the spray circulating pump simultaneously, and two kinds of pipelines connect side by side.
By technique scheme, one group or several groups of atomizing spray heat sinks are set on the desulfurizing tower gas approach; Each spraying cooling device is provided with atomizer; A plurality of atomizers are spaced apart in groups.
By technique scheme, described spraying cooling device is reduced to 80 ~ 110 ℃ with the absorption tower entrance flue gas temperature.
Experiment showed, that the height of flue-gas temperature directly influences the growing amount of sweetening process ammonium sulfate thing, the growing amount of flue-gas temperature ammonium persulfate particle is just high, otherwise then low; Moreover, the concentration of ammonium sulfate slurries (or solution) also directly influences the growing amount of ammonium sulfate thing in the desulfurizing tower, and the growing amount of concentration ammonium persulfate particle is also high, otherwise then low; Thereby; Adopt device of the present invention and technology, reduce the temperature of inlet flue gas from the source, and reduce the concentration of ammonium sulfate slurries (or solution) in the desulfurizing tower simultaneously; Effectively reduce the generation of this part ammonium sulfate solids dust granules, the discharging of control ammonium sulfate thing from the source.
With respect to prior art, the present invention can effectively reduce ammonium sulfate in the sweetening process, ammonium sulfite particle growing amount owing to adopted said apparatus and method, particularly reduces the generation of ammonium sulfate solids particle; Can also effectively solve desulphurization system water balance problem.Can effectively improve desulfuration byproduct ammonium sulfate output, reduce the ammonium sulfate dust granules thing of taking out of in company with flue gas simultaneously and enter atmosphere, the secondary pollution environment.
Description of drawings:
Below in conjunction with accompanying drawing and embodiment the present invention is described.
Fig. 1 is an apparatus structure sketch map of the present invention.
Wherein: 1 gas approach, 2 absorption towers, 3 exhaust pass, 4 spray circulating tanks, 5 spray circulating pumps, the female pipe of 6 spraying coolings, 7 spraying cooling devices, 8 nozzles.
The specific embodiment:
A kind of effect the by the present invention implements reduced the device that the ammonium sulfate thing generates in the ammonia process of desulfurization, comprises the absorption tower 2 that is used for desulfurization, the middle part inlet porting flue 1 of tower, and the top of tower is provided with exhaust pass 3; It is characterized in that: spraying cooling device 7 is set on gas approach 1, described spraying cooling device 7 be used for the spray circulating pump 5 that cooling agent boosts and link to each other; Cooling agent is 5% ~ 30% ammonium sulfate or water.
By technique scheme, the spraying cooling agent recovery channel on absorption tower 2 through spray circulating tank 4 and spray circulating pump mutually 5 even; Also adopt the mode that directly links to each other simultaneously with spray circulating pump 5; Two kinds of pipelines connect side by side.
By technique scheme, one group or several groups of atomizing spray heat sinks 7 are set on desulfurizing tower gas approach 1; Each spraying cooling device 7 is provided with atomizer 8; A plurality of atomizers 8 are spaced apart in groups.
By technique scheme, described spraying cooling device 7 is reduced to 80 ~ 110 ℃ with the absorption tower entrance flue gas temperature.
By the method that ammonium sulfate thing in a kind of effective reduction ammonia process of desulfurization of the present invention's enforcement generates, sulfur-containing smoke gas gets into from the centre entrance flue 1 of desulfuration absorbing tower 2, discharges from exhaust pass 3 through the clean flue gas of spraying layer and packing layer; It is characterized in that: gas approach 1 place at desulfuration absorbing tower 2 is provided with spraying cooling device 7; Effectively reduce the absorption tower entrance flue gas temperature; The discharging of control ammonium sulfate thing from the source, thus the content that discharges ammonium sulfate dust granules in the clean flue gas effectively reduced; 7 pairs of inlet flue gas of described spraying cooling device spray 5% ~ 30% ammonium sulfate or water.
By technique scheme, one group or several groups of atomizing spray heat sinks 7 are set on desulfurizing tower gas approach 1, the absorption tower entrance flue gas temperature is reduced to 80 ~ 110 ℃.
By technique scheme, the spraying cooling agent of spraying cooling device 7 gets into the spray circulating tank 4 outside the absorption tower 2 after reclaiming, and after spray circulating pump 5 boosts, gets into spraying cooling device 7 again.
By technique scheme, spraying cooling device 7 is provided with atomizer 8; A plurality of atomizers 8 are spaced apart in groups.
Above disclosedly be merely preferred embodiment of the present invention, can not limit the present invention's interest field certainly with this, the equivalence of therefore doing according to claim of the present invention changes, and still belongs to protection scope of the present invention.
Claims (8)
1. one kind is effectively reduced the method that the ammonium sulfate thing generates in the ammonia process of desulfurization, and sulfur-containing smoke gas gets into desulfuration absorbing tower from the centre entrance flue of desulfuration absorbing tower, discharges from exhaust pass through the clean flue gas of spraying layer and packing layer; It is characterized in that: the gas approach place at desulfuration absorbing tower is provided with the spraying cooling device, effectively reduces the absorption tower entrance flue gas temperature, the discharging of control ammonium sulfate thing from the source, thus effectively reduce the content that discharges ammonium sulfate dust granules in the clean flue gas; Described spraying cooling device sprays 5% ~ 30% ammonium sulfate or water to inlet flue gas.
2. method according to claim 1 is characterized in that: one group or several groups of atomizing spray heat sinks are set on the desulfurizing tower gas approach, the absorption tower entrance flue gas temperature is reduced to 80 ~ 110 ℃.
3. method according to claim 1 and 2 is characterized in that: the spraying cooling agent of spraying cooling device gets into the spray circulating tank outside the absorption tower after reclaiming, and after the spray circulating pump boosts, gets into the spraying cooling device again.
4. method according to claim 3 is characterized in that: the spraying cooling device is provided with atomizer; A plurality of atomizers are spaced apart in groups.
5. one kind is effectively reduced the device that the ammonium sulfate thing generates in the ammonia process of desulfurization, comprises the absorption tower that is used for desulfurization, the middle part inlet porting flue of tower, and the top of tower is provided with exhaust pass; It is characterized in that: the spraying cooling device is set on gas approach, described spraying cooling device be used for the spray circulating pump that cooling agent boosts and link to each other; Cooling agent is 5% ~ 30% ammonium sulfate or water.
6. device according to claim 5 is characterized in that: the spraying cooling agent recovery channel on absorption tower links to each other with the spray circulating pump through the spray circulating tank, and directly links to each other with the spray circulating pump simultaneously, and two kinds of pipelines connect side by side.
7. device according to claim 6 is characterized in that: one group or several groups of atomizing spray heat sinks are set on the desulfurizing tower gas approach; Each spraying cooling device is provided with atomizer; A plurality of atomizers are spaced apart in groups.
8. according to the described device of one of claim 5-7, it is characterized in that: described spraying cooling device is reduced to 80 ~ 110 ℃ with the absorption tower entrance flue gas temperature.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102192647A CN102728199A (en) | 2012-06-29 | 2012-06-29 | Method and apparatus capable of effectively reducing production of ammonium sulfate particles in ammonia desulphurization |
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|---|---|---|---|
| CN2012102192647A CN102728199A (en) | 2012-06-29 | 2012-06-29 | Method and apparatus capable of effectively reducing production of ammonium sulfate particles in ammonia desulphurization |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110605012A (en) * | 2019-09-16 | 2019-12-24 | 中国能源建设集团华中电力试验研究院有限公司 | Ammonia desulphurization process and system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101927129A (en) * | 2010-09-15 | 2010-12-29 | 江苏和亿昌环保工程科技有限公司 | Monotower ammonia desulfuration recovery method for removing aerosols in flue gas |
| CN202654932U (en) * | 2012-06-29 | 2013-01-09 | 武汉凯迪电力环保有限公司 | Device for effectively reducing ammonium sulfate particles generated by ammonia desulphurization |
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- 2012-06-29 CN CN2012102192647A patent/CN102728199A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101927129A (en) * | 2010-09-15 | 2010-12-29 | 江苏和亿昌环保工程科技有限公司 | Monotower ammonia desulfuration recovery method for removing aerosols in flue gas |
| CN202654932U (en) * | 2012-06-29 | 2013-01-09 | 武汉凯迪电力环保有限公司 | Device for effectively reducing ammonium sulfate particles generated by ammonia desulphurization |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110605012A (en) * | 2019-09-16 | 2019-12-24 | 中国能源建设集团华中电力试验研究院有限公司 | Ammonia desulphurization process and system |
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Application publication date: 20121017 |