CN104645817B - The more pH classified sprayings control desulphurization systems of single column and technique - Google Patents
The more pH classified sprayings control desulphurization systems of single column and technique Download PDFInfo
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- CN104645817B CN104645817B CN201510079929.2A CN201510079929A CN104645817B CN 104645817 B CN104645817 B CN 104645817B CN 201510079929 A CN201510079929 A CN 201510079929A CN 104645817 B CN104645817 B CN 104645817B
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Abstract
The invention provides a kind of more pH classified sprayings control desulphurization systems of single column and technique, the system includes desulfurizing tower, more pH classified sprayings systems, calcium plaster liquid pool, oxidation air system, agitator, gypsum excavationg pump, circulation pump group, two-phase high efficiency static mixer, pH adjusting agent induction system and multistage pH adjusting agent distribution system；The technique is based on the system, the bottom slurry pH of desulfurizing tower is controlled 4.8~5.3, the more pH classifications of the spraying layer of more pH classified sprayings systems are realized by multistage pH adjusting agent distribution system and two-phase high efficiency static mixer, while desulfuration efficiency brings up to 99% and the above, the formation of the bottom gypsum of desulfurizing tower is not influenceed.The present invention realizes the subregion pH controls of single column single circulation process, has the advantages of simple in construction, floor space is small, stable, transformation difficulty is low, small investment.
Description
Technical field
The present invention relates to Flue Gas Desulfurization Technology of Power Plant field, in particular it relates to a kind of more pH classified sprayings controls of single column
Desulphurization system and technique processed.
Background technology
《On print and distribute the energy-saving and emission-reduction of ＜ coal electricity upgrading with transformation action plan 2014-2020) ＞ notice》(hair changes energy
Source [2014] 2093) in the SO of Thermal Power Generation Industry2Emission request makes important written instructions, it is desirable to east some areas coal unit
SO2Discharge capacity is not higher than 35mg/Nm3.This compared with《Fossil-fuel power plant atmospheric pollutant emission standard》(GB13223-2011) in " usually
Area SO2Discharge limitation 100mg/Nm3Hereinafter, some areas 50mg/Nm3Requirement below " has raising by a relatively large margin.
At present, coal fired power plant flue gas desulfurization mainly uses Gypsum Wet technique, and the technology is typically by slurrying system
System, absorption tower system, Waste Water Treatment, gypsum dehydration system and other accessory systems are formed.Traditional wet desulfurizing process
(single column single cycle) its SO2Removal efficiency is 98% or so, as boiler combustion sulfur-bearing rate SO more than 0.8% or in flue gas2's
Concentration is more than 1800mg/Nm3When, the technique would become hard to reach not higher than 35mg/Nm3Emission request.
In order to meet increasingly stricter emission request, it is double that single column is generated on the basis of traditional single column single circulation process
The modified technique such as circulation and double tower Two-way Cycle.Though these technologies disclosure satisfy that 35mg/Nm substantially3Emission request, it is but multiple
Miscellaneous technique and structure, fluctuation of service, floor space is big, high energy consumption, big investment the defects of limit it to a certain extent and push away
Wide application.Followed particularly in the power plant built well, it is necessary to find out corresponding space completion single column Two-way Cycle and double tower pair again
The improvement of ring is extremely difficult, and by chance the effect work that carries of desulfurization is largely in the coal fired thermal power plant built up.
Therefore, on the basis of traditional sulfur removal technology, research and develop a kind of efficiency high, take up an area province, reliable, energy consumption
Low new and effective sulfur removal technology is coal fired thermal power plant energy-saving and emission-reduction urgent problem to be solved.
The content of the invention
For in the prior art the defects of, it is an object of the invention to provide a kind of single column more pH classified sprayings control desulfurization systems
System and technique, while high desulfurization efficiency and project duration requirement is reached, it is ensured that unit operation is stable, saves and takes up an area and throw
Money.
According to an aspect of the present invention, there is provided a kind of more pH classified sprayings control desulphurization systems of single column, the system bag
Include desulfurizing tower, more pH classified sprayings systems, calcium plaster liquid pool, oxidation air system, agitator, gypsum excavationg pump, circulation pump group,
Two-phase high efficiency static mixer, pH adjusting agent induction system and multistage pH adjusting agent distribution system, wherein：
More pH classified sprayings systems are arranged at the middle and upper part of the desulfurizing tower；
The calcium plaster liquid pool is arranged at the bottom of the desulfurizing tower；
The oxidation air system and the agitator are arranged in the calcium plaster liquid pool；
The gypsum excavationg pump is connected to the bottom sides of the calcium plaster liquid pool, and reacted pH adjusting agent is empty with oxidation
The gypsum of gas haptoreaction generation discharges the desulfurizing tower by the gypsum excavationg pump；
It is connected between the calcium plaster liquid pool and more pH classified sprayings systems by circulating pump group；
The two-phase high efficiency static mixer is arranged between the circulation pump group and the calcium plaster liquid pool, for realizing
Short distance of the pH adjusting agent with circulating gypsum slurries uniformly mixes；
The pH adjusting agent induction system is used for defeated to the desulfurizing tower and the multistage pH adjusting agent distribution system respectively
Send pH adjusting agent；
Between the multistage pH adjusting agent distribution system and the two-phase high efficiency static mixer and the calcium plaster liquid pool
Pipeline connects, and the multistage pH adjusting agent distribution system is used for the pH for controlling the different spraying layers of more pH classified sprayings systems
Conditioning agent injection rate, to reach the purpose of more pH classified sprayings.
Preferably, it is additionally provided with demisting in the upper position of more pH classified sprayings systems of the desulfurizing tower middle and upper part
Device, the demister are used to remove part droplet and particulate pollutant in neat stress.
Preferably, the middle and lower part of the desulfurizing tower is additionally provided with inlet flue duct, and pending former flue gas is from the import cigarette
Road enters in the desulfurizing tower；Exhaust pass is additionally provided with the top of the desulfurizing tower, neat stress is after demister is handled from institute
State exhaust pass discharge.
Preferably, the multistage pH adjusting agent distribution system is made up of regulation valve group and delicate flow measurement apparatus；In calcium
Sulphur is than desulfurization that in the case of certain, more than 99% is realized by adjusting the chain control between valve group and delicate flow measurement apparatus
Efficiency.
Preferably, every layer of spraying layer of more pH classified sprayings systems is respectively provided with a number of efficiently homogeneous atomization spiral shell
Churning mouth.
Preferably, the pH adjusting agent of more pH classified sprayings systems can be from the pH adjusting agent induction system
Lime stone or Ca (OH)2With NaOH alkaline solution.
Preferably, the pH value of more pH classified sprayings systems is adjustable, and pH value is with more pH classified sprayings systems under
It is stepped up on and.
According to another aspect of the present invention, there is provided one kind is described based on the more pH classified sprayings control sulfur removal technologies of single column
Technique comprises the following steps：
The first step, pending former flue gas entered in desulfurizing tower from the inlet flue duct of the middle and lower part for being arranged at desulfurizing tower；
Second step, the SO from pH adjusting agent induction system2PH adjusting agent divides two parts：A portion is directly entered de-
Sulphur tower, for the pH in calcium plaster liquid pool for controlling desulfurization tower bottom in the range of 4.8~5.3, another part then enters multistage
PH adjusting agent distribution system, pass through the regulation valve group in multistage pH adjusting agent distribution system and the more pH of delicate flow measurement apparatus system
The different spraying layer pH adjusting agent injection rates of classified spraying system, reach the purpose of more pH classified sprayings, so that SO2Remove
Rate is improved to more than 99%；
3rd step, in the presence of two-phase high efficiency static mixer, pH adjusting agent and gypsum slurries can in short distance
Realize the high uniformity mixing of solid and liquid；
4th step, pH adjusting agent you can well imagine by circulating pump component after being well mixed with gypsum slurries and rise to more pH classified sprayings
The different spraying layers of system, the former flue gas with adverse current after efficiently homogeneous atomization spiral nozzle uniform atomizing reacts, with de-
Except the SO in former flue gas2, obtain neat stress；Due to each spraying layer pH raising, more than 99% SO can be reached2Clearance；
5th step, caused neat stress then pass through the demister that is arranged above more pH classified sprayings systems except removing cigarette
In gas after part droplet and particulate pollutant, chimney is discharged into from the exhaust pass at the top of desulfurizing tower；
6th step, reacted pH adjusting agent are fallen into the calcium plaster liquid pool for being arranged at desulfurization tower bottom, in agitator
Effect is lower and the abundant haptoreaction of oxidation air generates gypsum, finally discharges desulfurizing tower by gypsum excavationg pump, to do further
Processing.
Compared with prior art, the present invention has following beneficial effect：
The present invention realize single column single circulation process subregion pH control, have it is simple in construction, floor space is small, operation
The advantages of stabilization, transformation difficulty are low, small investment.
Brief description of the drawings
The detailed description made by reading with reference to the following drawings to non-limiting example, further feature of the invention,
Objects and advantages will become more apparent upon：
Fig. 1 is the overall system architecture schematic diagram of one embodiment of the invention；
In figure：Desulfurizing tower 1, inlet flue duct 2, exhaust pass 3, calcium plaster liquid pool 4, lime stone slurry induction system 5, precision
Flow measurement device 6, regulation valve group 7, two-phase high efficiency static mixer 8, circulation pump group 9, more pH classified sprayings systems 10, efficiently
Homogeneous atomization spiral nozzle 11, demister 12, oxidation air system 13, agitator 14, gypsum excavationg pump 15, multistage limestone slurry
Liquid distribution system 16.
Embodiment
With reference to specific embodiment, the present invention is described in detail.Following examples will be helpful to the technology of this area
Personnel further understand the present invention, but the invention is not limited in any way.It should be pointed out that the ordinary skill to this area
For personnel, without departing from the inventive concept of the premise, various modifications and improvements can be made.These belong to the present invention
Protection domain.
PH adjusting agent is illustrated using lime stone slurry come the specific implementation to the present invention in following examples, but
Can also be Ca (OH) in other embodiment2With NaOH alkaline solution.
Embodiment 1
As shown in figure 1, the more pH classified sprayings control example structure schematic diagrams of desulphurization system one of single column of the present invention, the system
System includes：Desulfurizing tower 1, inlet flue duct 2, exhaust pass 3, calcium plaster liquid pool 4, lime stone slurry induction system 5, delicate flow are surveyed
Measure device 6, regulation valve group 7, two-phase high efficiency static mixer 8, circulation pump group 9, efficiently more pH classified sprayings systems 10, homogeneous mist
Change spiral nozzle 11, demister 12, oxidation air system 13, agitator 14, gypsum excavationg pump 15, the distribution of multistage lime stone slurry
System 16, wherein：
The top of the desulfurizing tower 1 sets the exhaust pass 3；The middle and upper part of the desulfurizing tower 1 is set respectively from the bottom up
Put more pH classified sprayings systems 10 and the demister 12；The middle and lower part of the desulfurizing tower 1 sets the inlet flue duct 2；
The bottom of the desulfurizing tower 1 sets the calcium plaster liquid pool 4；The calcium plaster liquid pool 4 and more pH classified sprayings systems 10
Between by circulate pump group 9 be connected；The two-phase high efficiency static mixer 8 is arranged in the circulation pump group 9 and the calcium plaster
Between liquid pool 4；The multistage lime stone slurry distribution system 16 and the two-phase high efficiency static mixer 8 and the gypsum slurries
Pipeline connects between pond 4；The lime stone slurry induction system 5 is used for respectively to the desulfurizing tower 1 and the multistage lime stone
Distribution of slurry system 16 conveys lime stone slurry；Oxidation air system 13 and agitator 14 are provided with the calcium plaster liquid pool 4；
The described bottom of calcium plaster liquid pool 4 is provided with gypsum excavationg pump 15.
In the present embodiment, described multistage lime stone slurry distribution system 16 is by regulation valve group 7 and delicate flow measurement dress
6 compositions are put, by delicate flow measurement apparatus 6 to the actual measured value of the lime stone slurry of addition and the comparison of calculated value, are come
It is determined that the size of the regulation aperture of valve group 7；In the case where calcium sulfur ratio is certain, by being adjusted in multistage lime stone slurry distribution system 16
The chain control between valve group 7 and delicate flow measurement apparatus 6 is saved, realizes more than 99% desulfuration efficiency.
In the present embodiment, each spraying layer of described more pH classified sprayings systems 10 is provided with several efficiently homogeneous mists
Change spiral nozzle 11.
In the present embodiment, the pH value of described more pH classified sprayings systems 10 is adjustable, and pH is with more pH classified sprayings systems
System 10 is stepped up from bottom to top.
In the present embodiment, described two-phase high efficiency static mixer 8 can realize lime stone slurry and circulation gypsum slurries
Short distance uniformly mix.
Embodiment 2
The present embodiment provides a kind of single column more pH classified sprayings control sulfur removal technologies, as follows the step of the technique：
1st, pending former flue gas enters in desulfurizing tower 1 from inlet flue duct 2；
2nd, the lime stone slurry from lime stone slurry induction system 5 divides two parts, and a portion is directly entered desulfurization
Tower 1, the pH value in calcium plaster liquid pool 4 for controlling the bottom of desulfurizing tower 1 is in the range of 4.8~5.3, another part then enter it is more
Level lime stone slurry distribution system 16, the regulation valve group 7 and delicate flow measurement apparatus 6 of multistage lime stone slurry distribution system 16
The lime stone slurry injection rate of more pH classified sprayings system difference spraying layers is controlled by control signal, reaches more pH classified sprayings
Purpose so that SO2Removal rate is improved to more than 99%；
3rd, in the presence of two-phase high efficiency static mixer 8, the lime stone slurry in pipeline is with gypsum slurries in short distance
The interior high uniformity mixing that can realize solid and liquid；
4th, the lime stone slurry after being well mixed is promoted to more pH classified sprayings systems 10 not respectively by circulating pump group 9
Same spraying layer, the former flue gas with adverse current after the efficiently homogeneous atomization uniform atomizing of spiral nozzle 11 reacts, to remove former cigarette
SO in gas2Obtain neat stress；Due to the raising of each spraying layer pH in more pH classified sprayings systems 10, more than 99% can be reached
SO2 clearances；
5th, neat stress is then passed through in the removing neat stress of demister 12 and pushed up after part droplet and particulate pollutant from desulfurizing tower 1
The exhaust pass 3 in portion is discharged into chimney；
6th, reacted lime stone slurry then falls into the calcium plaster liquid pool 4 of the bottom of desulfurizing tower 1, in the presence of agitator 14
With the abundant haptoreaction generation gypsum of oxidation air of oxidation air system release, desulfurizing tower is finally discharged by gypsum excavationg pump 15
1 further processing.
As higher SO need to be obtained2Removal efficiency, the pH that multistage lime stone slurry distribution system 16 is injected need to only be adjusted
Agent (lime stone slurry) is changed to the stronger Ca of reproducibility (OH)2With NaOH alkaline solution.
The present invention realize single column single circulation process subregion pH control, have it is simple in construction, floor space is small, operation
The advantages of stabilization, transformation difficulty are low, small investment.
The specific embodiment of the present invention is described above.It is to be appreciated that the invention is not limited in above-mentioned
Particular implementation, those skilled in the art can make various deformations or amendments within the scope of the claims, this not shadow
Ring the substantive content of the present invention.
Claims (2)
1. a kind of more pH classified sprayings control desulphurization systems of single column, it is characterised in that the system includes desulfurizing tower, more pH are classified
Spray system, calcium plaster liquid pool, oxidation air system, agitator, gypsum excavationg pump, circulation pump group, the mixing of two-phase high efficiency static
Device, pH adjusting agent induction system and multistage pH adjusting agent distribution system, wherein：
More pH classified sprayings systems are arranged at the middle and upper part of the desulfurizing tower；
The calcium plaster liquid pool is arranged at the bottom of the desulfurizing tower；
The oxidation air system and the agitator are arranged in the calcium plaster liquid pool；
The gypsum excavationg pump is connected to the bottom sides of the calcium plaster liquid pool, and reacted pH adjusting agent connects with oxidation air
The gypsum for touching reaction generation discharges the desulfurizing tower by the gypsum excavationg pump；
It is connected between the calcium plaster liquid pool and more pH classified sprayings systems by circulating pump group；
The two-phase high efficiency static mixer is arranged between the circulation pump group and the calcium plaster liquid pool, for realizing that pH is adjusted
Short distance of the section agent with circulating gypsum slurries uniformly mixes；
The pH adjusting agent induction system is used to convey pH to the desulfurizing tower and the multistage pH adjusting agent distribution system respectively
Conditioning agent；
Pipeline between the multistage pH adjusting agent distribution system and the two-phase high efficiency static mixer and the calcium plaster liquid pool
Connection, the multistage pH adjusting agent distribution system are used for the pH regulations for controlling the different spraying layers of more pH classified sprayings systems
Agent injection rate, to reach the purpose of more pH classified sprayings；
The pH adjusting agent of more pH classified sprayings systems is the lime stone from the pH adjusting agent induction system, or Ca
(OH)2With NaOH alkaline solution；
PH in the calcium plaster liquid pool of the desulfurization tower bottom is controlled in the range of 4.8~5.3；
Demister, the demisting are additionally provided with the upper position of more pH classified sprayings systems of the desulfurizing tower middle and upper part
Device is used to remove part droplet and particulate pollutant in neat stress；
The middle and lower part of the desulfurizing tower is additionally provided with inlet flue duct, and pending former flue gas enters described de- from the inlet flue duct
In sulphur tower；Exhaust pass is additionally provided with the top of the desulfurizing tower, neat stress is arranged after demister is handled from the exhaust pass
Go out；
The multistage pH adjusting agent distribution system is made up of regulation valve group and delicate flow measurement apparatus；In the certain feelings of calcium sulfur ratio
Under condition, the desulfuration efficiency of realizing more than 99% by adjusting the chain control between valve group and delicate flow measurement apparatus；
Every layer of spraying layer of more pH classified sprayings systems is respectively provided with some efficiently homogeneous atomization spiral nozzles；
The pH value of more pH classified sprayings systems is adjustable, and pH value progressively rises from bottom to top with more pH classified sprayings systems
It is high.
2. the more pH classified sprayings control sulfur removal technologies of a kind of single column using system described in claim 1, it is characterised in that described
Technique comprises the following steps：
The first step, pending former flue gas entered in desulfurizing tower from the inlet flue duct of the middle and lower part for being arranged at desulfurizing tower；
Second step, the pH adjusting agent from pH adjusting agent induction system divide two parts：A portion is directly entered desulfurizing tower, uses
In the pH value in the calcium plaster liquid pool of control desulfurization tower bottom in setting range, another part then enters multistage pH adjusting agent point
Match system；The different spraying layer pH adjusting agent injection rates of more pH classified sprayings systems are controlled, reach the purpose of more pH classified sprayings；
The pH adjusting agent of more pH classified sprayings systems is the lime stone from the pH adjusting agent induction system, or Ca (OH)2
With NaOH alkaline solution；
3rd step, in the presence of two-phase high efficiency static mixer, pH adjusting agent can be realized with gypsum slurries in short distance
The high uniformity of solid and liquid mixes；
4th step, pH adjusting agent you can well imagine by circulating pump component after being well mixed with gypsum slurries and rise to more pH classified sprayings systems
Different spraying layers, reacted after efficiently homogeneous atomization spiral nozzle uniform atomizing with the former flue gas of adverse current, to remove original
SO in flue gas2, obtain neat stress；
5th step, caused neat stress then pass through the demister being arranged above more pH classified sprayings systems and removed in neat stress
After part droplet and particulate pollutant, chimney is discharged into from the exhaust pass at the top of desulfurizing tower；
6th step, reacted pH adjusting agent are fallen into the calcium plaster liquid pool for being arranged at desulfurization tower bottom, in the effect of agitator
The abundant haptoreaction generation gypsum of lower and oxidation air, finally discharges desulfurizing tower by gypsum excavationg pump, to be further processed,
PH in the calcium plaster liquid pool of the desulfurization tower bottom is controlled in the range of 4.8~5.3.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105032149A (en) * | 2015-07-07 | 2015-11-11 | 沈阳化工大学 | Calcium carbonate/calcium hydrate-gypsum wet desulphurization and dedusting process for flue gas |
| CN107648988B (en) * | 2017-08-08 | 2023-08-15 | 华电电力科学研究院有限公司 | Device and method for adjusting desulfurization slurry supply flow through double loops |
| CN112999857B (en) * | 2021-02-24 | 2021-10-26 | 大唐环境产业集团股份有限公司 | Regulation and control method and regulation and control system for wide-load limestone slurry supply system |
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|---|---|---|---|---|
| CN101306317A (en) * | 2008-02-14 | 2008-11-19 | 娄爱娟 | Tower top discharge type flue gas desulfurization method |
| CN102172474A (en) * | 2011-02-17 | 2011-09-07 | 大连海事大学 | Method for controlling pH value of spray slurry in magnesium-based seawater process ship desulfurization system |
| CN203155083U (en) * | 2013-03-28 | 2013-08-28 | 尹辉 | In-tower pH value regionally-differentiated wet desulfurization device |
| CN204469535U (en) * | 2015-02-13 | 2015-07-15 | 上海电气电站环保工程有限公司 | Single tower many pH classified spraying controls desulfurizer |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104147913B (en) * | 2013-09-13 | 2016-04-27 | 上海大学 | A kind of two-phase of wet ammonia process desulfurizing technology adds ammonia process |
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- 2015-02-13 CN CN201510079929.2A patent/CN104645817B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101306317A (en) * | 2008-02-14 | 2008-11-19 | 娄爱娟 | Tower top discharge type flue gas desulfurization method |
| CN102172474A (en) * | 2011-02-17 | 2011-09-07 | 大连海事大学 | Method for controlling pH value of spray slurry in magnesium-based seawater process ship desulfurization system |
| CN203155083U (en) * | 2013-03-28 | 2013-08-28 | 尹辉 | In-tower pH value regionally-differentiated wet desulfurization device |
| CN204469535U (en) * | 2015-02-13 | 2015-07-15 | 上海电气电站环保工程有限公司 | Single tower many pH classified spraying controls desulfurizer |
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