CN105498435A - Preparation method for novel deacidification agent with agglomeration effect on PM2.5 - Google Patents
Preparation method for novel deacidification agent with agglomeration effect on PM2.5 Download PDFInfo
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- CN105498435A CN105498435A CN201510889859.7A CN201510889859A CN105498435A CN 105498435 A CN105498435 A CN 105498435A CN 201510889859 A CN201510889859 A CN 201510889859A CN 105498435 A CN105498435 A CN 105498435A
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- polyacrylamide
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- deacidification agent
- calgon
- agglomeration
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01D51/00—Auxiliary pretreatment of gases or vapours to be cleaned
- B01D51/02—Amassing the particles, e.g. by flocculation
- B01D51/04—Amassing the particles, e.g. by flocculation by seeding, e.g. by adding particles
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Abstract
The invention discloses a preparation method for a novel deacidification agent with a pre-agglomeration effect on PM2.5 and application of the novel deacidification agent. The preparation method comprises the following steps: using sodium hexametaphosphate to perform surface modification on polyacrylamide, and performing mechanical and physical mixing and homogenization on the modified polyacrylamide and novel deacidification agent powder according to different mass percentages. The novel deacidification agent prepared through the method is good in dispersity, and has an excellent removal effect on particles with size of 0.1 micron or above; under a semi-dry method and dry method process condition, the removal efficiency of the novel deacidification agent with the pre-agglomeration effect on PM2.5 to PM2.5 can reach 92.3%. The method provided by the invention is simple in technological process, easy to realize, low in comprehensive cost and free of secondary hazards.
Description
Technical field
The invention belongs to environment-friendly materials preparation field, be specially a kind of to PM
2.5there is the novel deacidification agent preparation method of agglomeration.
Background technology
PM
2.5be that in air, diameter is less than or equal to the particle of 2.5 μm, although proportion shared in Atmospheric components is very little, have material impact to air quality and visibility.The PM that the World Health Organization provides
2.5safety restriction be year concentration 10 μ g/m
3.2010, the health data provided showed, Beijing, Shanghai, Guangzhou, Xi'an are by PM
2.5pollute the death toll caused and be respectively 2724,3247,1984,742, ratio 2.0%, 1.7%, 2.3%, 1.6%, the four urban economy loss accounting for death toll then reaches 61.7 hundred million yuan.In international cancer research meeting in Lyons, PM2.5 is confirmed to be the carcinogenic substance of the mankind.In view of this PM
2.5huge for Health Impact.
PM
2.5source be mainly divided into two kinds of natural sources and artificial source.Natural source is from the volatilization of the natural phenomenas such as desert, exposed ground, forest fire, volcanic eruption; Artificial source is from the process such as burning, vehicle exhaust, industrial production, social construction of fuel, and this is PM
2.5topmost source, therefore to strengthen emphatically the control to artificial source, reduce PM
2.5.Since nineteen ninety, PM in air
2.5concentration constantly rise, wherein power plant emission is at about 1,000,000 t.In thermal power plant's flue dust, major part is PM
2.5, and ratio improves year by year, thermal power plant must to PM
2.5take appropriate measures emissions reduction.
PM
2.5exist with water soluble ion aerosol in an atmosphere, sulfate, ammonium salt, nitrate are its important parts.Particle through gathering power plant is tested, and the particle in power plant's air mainly consists of SiO
2, Al
2o
3, Fe
2o
3and CaO.The fuel adopted when power plant is different, and the chemical composition contained in the final particle produced is also different.At present, for the PM in power plant
2.5, the method for employing: Traditional control technology, mixing dust removing control technology, agglomeration techniques.Traditional control technology, based on electrostatic precipitator or bag-type dust, and is accompanied with wet desulphurization.When in adopting wet desulphurization system to flue gas, fine particle removes, not high to the particulate matter removing efficiency being less than 2.5 μm; Denitration technology is also to removing PM in addition
2.5there is facilitation.Mixing dust removing control technology is divided into again: electrostatic adds whirlwind, electrostatic adds gravel bed filter, electrostatic adds cloth bag.Agglomeration techniques comprises electricity reunion, acoustic agglomeration, heat reunion, turbulent boundary layer reunion, light reunion and chemical agglomeration etc.These two kinds of technology add the input of power plant undoubtedly, and for original power plant, Late reformation is difficult especially.
Adopt semidry method and dry method to be combined with each other herein, and by being connected with bag-type dust, carrying out depickling and removing PM
2.5.Difference between research lime and novel deacidification agent between physico-chemical property, and analyze its impact on fume indication.Combine synchronous these two kinds of deacidifying process of employing for garbage power plant simultaneously, remove PM
2.5.
Summary of the invention
The present invention utilizes surfactant calgon to carry out modification to organic high molecular polymer polyacrylamide, is then added to by modified polyacrylamide in the deacidification agent of garbage power plant dry method dust, prepares PM
2.5there is the novel deacidification agent of agglomeration.Because this kind of polymer-modified deacidification agent that facilitates promotes PM
2.5seizure effect, thus show the better stability of more single deacidification agent and the feature of environmental protection.The common deacidification agent used by garbage power plant dry method system is compared, and the novel deacidification agent containing polyacrylamide shows PM
2.5more superior seizure and agglomeration.
The object of the invention is to propose one to PM
2.5there is the novel deacidification agent preparation method of pre-agglomeration
One provided by the invention is to PM
2.5the novel deacidification agent preparation method with pre-agglomeration is as follows: first with deionized water, polyacrylamide, calgon for presoma, through stirring and preparing the polyacrylamide powder of surface modification after drying; Then polyacrylamide and deacidification agent two kinds of powders are mixed than homogenizing with a certain amount of quality, finally obtain PM
2.5there is the novel deacidification agent of pre-agglomeration.
The present invention is given in the concrete technology parameter on said method basis further:
1, the preparation technology parameter of the polyacrylamide powder of surface modification: polyacrylamide and deionized water mix with finite concentration, this mixed liquor is transferred to heated at constant temperature in beaker to stir, concentration 0.1 ~ 0.5gL-1 wherein in polyacrylamide solution, solution temperature preferably 25 DEG C, the preferred 0.5h of mixing time.Solution after stirring adds calgon, and wherein the addition of calgon is 0.1% ~ 0.5% of polyacrylamide quality, and after adding calgon, mixed solution is ultrasonic vibration 1h then.
2, grind after the 70 DEG C of dry 24h of the solution after ultrasonic vibration.
3, the polyacrylamide powder of dried surface modification mixes homogenizing with sodium bicarbonate powder according to the ratio of 0.5% ~ 1.0% (mass percent), and mixed powder is for desulphurization denitration in garbage power plant dry method system and catch the reunion of PM2.5.
The present invention gives preferred scheme, specific as follows:
Polyacrylamide and deionized water mix with finite concentration, this mixed liquor are transferred to heated at constant temperature in beaker and stir, the concentration 0.1 ~ 0.5gL-1 wherein in polyacrylamide solution, solution temperature preferably 25 DEG C, time preferred 0.5h.Solution after stirring adds calgon, wherein the addition of calgon is 0.1% ~ 1.0% of polyacrylamide quality, after adding calgon, mixed solution is ultrasonic vibration 1h then, grind after the 70 DEG C of dryings of solution after ultrasonic vibration, the polyacrylamide powder of dried surface modification mixes homogenizing with sodium bicarbonate powder according to the ratio of 1.0% (mass percent), and mixed powder is for desulphurization denitration in garbage power plant dry method system and catch the reunion of PM2.5.
The mechanism of action of the present invention is: organic polymer polyacrylamide is modified through cationic surfactant calgon, polyacrylamide surface is now with positive charge, surface electrical negativity weakens, after mixing with deacidification agent sodium bicarbonate, to PM in sack cleaner
2.5suction-operated strengthen, simultaneously polyacrylamide particle surface is due to electrostatic repulsion, disperses more even, to PM in sack cleaner
2.5seizure effect strengthen, facilitate PM
2.5agglomeration, make PM
2.5more free settling in flue gas, compare the deacidification agent of single component, mixed powder shows better stability and the feature of environmental protection.
The novel deacidification agent that the present invention obtains, has good removal effect to the particle being greater than 0.1 μm when empirical tests uses in sack cleaner.In sack cleaner in novel deacidification agent to PM
2.5removal efficiency reach 92.3%, meanwhile, novel deacidification agent is also to PM
2.5in water miscible ion also there is good removal effect.
The feature of method provided by the invention:
1, be conducive to environmental protection, do not produce secondary harm.
2, technical process is simple, is easy to realize, and be convenient to control, consumption is few, and integrated cost is low.
Accompanying drawing explanation
Fig. 1 is (a) (b) amounts of particles distribution afterwards before the novel deacidification agent technique of the polyacrylamide of certain garbage power plant sack cleaner use surface modification.
Fig. 2 uses the novel deacidification agent of the polyacrylamide after containing surface modification to PM
2.5the removal effect of middle soluble ion concentration.
Detailed description of the invention
The following examples can make those skilled in the art more fully understand the present invention, but do not limit the present invention in any way.
Embodiment 1
(1) polyacrylamide powder is dissolved in deionized water solution, and it is concentration 0.1gL
-1, solution temperature preferably 25 DEG C, the preferred 0.5h of mixing time.Solution after stirring adds calgon, and wherein the addition of calgon is 0.1% of polyacrylamide quality, and after adding calgon, mixed solution is ultrasonic vibration 1h then.
(2) grind after the 70 DEG C of dryings of the solution after ultrasonic vibration, the polyacrylamide powder of dried surface modification mixes homogenizing with sodium bicarbonate powder according to the ratio of 1.0% (mass percent), and mixed powder is for desulphurization denitration in garbage power plant dry method system and to PM
2.5reunion catch.
Embodiment 2
(1) polyacrylamide powder is dissolved in deionized water solution, and it is concentration 0.1gL
-1, solution temperature preferably 25 DEG C, the preferred 0.5h of mixing time.Solution after stirring adds calgon, and wherein the addition of calgon is 0.5% of polyacrylamide quality, and after adding calgon, mixed solution is ultrasonic vibration 1h then.
(2) grind after the 70 DEG C of dryings of the solution after ultrasonic vibration, the polyacrylamide powder of dried surface modification mixes homogenizing with sodium bicarbonate powder according to the ratio of 1.0% (mass percent), and mixed powder is for desulphurization denitration in garbage power plant dry method system and to PM
2.5reunion catch.
Embodiment 3
(1) polyacrylamide powder is dissolved in deionized water solution, and it is concentration 0.5g.L
-1, solution temperature preferably 25 DEG C, the preferred 0.5h of mixing time.Solution after stirring adds calgon, and wherein the addition of calgon is 0.5% of polyacrylamide quality, and after adding calgon, mixed solution is ultrasonic vibration 1h then.
(2) grind after the 70 DEG C of dryings of the solution after ultrasonic vibration, the polyacrylamide powder of dried surface modification mixes homogenizing with sodium bicarbonate powder according to the ratio of 1.0% (mass percent), and mixed powder is for desulphurization denitration in garbage power plant dry method system and to PM
2.5reunion catch.
Embodiment 4
(1) polyacrylamide powder is dissolved in deionized water solution, and it is concentration 0.5g.L
-1, solution temperature preferably 25 DEG C, the preferred 0.5h of mixing time.Solution after stirring adds calgon, and wherein the addition of calgon is 1.0% of polyacrylamide quality, and after adding calgon, mixed solution is ultrasonic vibration 1h then.
(2) grind after the 70 DEG C of dryings of the solution after ultrasonic vibration, the polyacrylamide powder of dried surface modification mixes homogenizing with sodium bicarbonate powder according to the ratio of 1.0% (mass percent), and mixed powder is for desulphurization denitration in garbage power plant dry method system and to PM
2.5reunion catch.
Application Example
Application Example 1 and embodiment 2 are relatively to PM
2.5agglomeration:
Be dry-process deacidification agent by the novel deacidification agent containing modified polyacrylamide and lime respectively, controlling dry method feed aperture in experimentation is 10Hz, semidry method lime white discharge rate is 1500L/h, lime white concentration 8%, after stable 24h, respectively the flue gas of the flue gas before depickling reaction tower and bag-type dust is collected, measure PM
2.5concentration, obtain the data as following table 1.Removal efficiency=(entrance PM
2.5concentration-outlet PM
2.5concentration)/entrance PM
2.5concentration × 100%.The present invention obtain to PM
2.5have the novel deacidification agent of pre-agglomeration, warp is to PM
2.5after entrance and exit concentration determination, the removal efficiency of semidry method+dry method (lime) and semidry method+dry method (novel deacidification agent) is respectively 68.1% and 92.3%.Test result as shown in Figure 1 and Figure 2, concrete PM
2.5concentration values is as shown in table 1.
Fly ash granule concentration and removal efficiency before and after table 1 two kinds of methods
Claims (6)
1. one kind has the novel deacidification agent preparation method of pre-agglomeration to PM2.5, it is characterized in that carrying out according to following step: first with deionized water, polyacrylamide, calgon for presoma, through stirring and preparing the polyacrylamide powder of surface modification after drying; Then polyacrylamide and deacidification agent two kinds of powders are mixed than homogenizing with a certain amount of quality, finally obtain novel deacidification agent PM2.5 to pre-agglomeration.
2. a kind of novel deacidification agent preparation method PM2.5 to pre-agglomeration according to claim 1, it is characterized in that the technological parameter of the polyacrylamide powder preparing surface modification: polyacrylamide and deionized water mix with finite concentration, concentration wherein in polyacrylamide solution preferably 0.1 ~ 0.5gL-1, solution temperature preferably 25 DEG C, time preferred 0.5h.Solution after stirring adds calgon, and wherein the addition of calgon is preferably 0.1% ~ 0.5% of polyacrylamide quality, after adding calgon, and mixed solution is ultrasonic vibration 1h then.
3. a kind of novel deacidification agent preparation method PM2.5 to pre-agglomeration according to claim 1, after it is characterized in that polyacrylamide solution need 70 DEG C of dryings of surface modification, 24 grind.
4. a kind of novel deacidification agent preparation method PM2.5 to pre-agglomeration according to claim 1, is characterized in that dried surface modification polyacrylamide powder carries out mechanical-physical with sodium bicarbonate powder according to the ratio of 1.0% (mass percent) and mixes homogenizing.
5. one according to claim 1 is to PM
2.5have the novel deacidification agent preparation method of pre-agglomeration, it is characterized in that polyacrylamide powder is dissolved in deionized water solution, it is concentration 0.1gL
-1, solution temperature preferably 25 DEG C, time preferred 0.5h.Solution after stirring adds calgon, and wherein the addition of calgon is 0.1% of polyacrylamide quality, and after adding calgon, mixed solution is ultrasonic vibration 1h then.Grind after the 70 DEG C of dryings of solution after ultrasonic vibration, the polyacrylamide powder of dried surface modification mixes homogenizing with sodium bicarbonate powder according to the ratio mechanical-physical of 0.5% (mass percent).
6. one according to claim 1 is to PM
2.5have the novel deacidification agent preparation method of pre-agglomeration, it is characterized in that polyacrylamide powder is dissolved in deionized water solution, it is concentration 0.5gL
-1, solution temperature preferably 25 DEG C, time preferred 0.5h.Solution after stirring adds calgon, and wherein the addition of calgon is 1.0% of polyacrylamide quality, and after adding calgon, mixed solution is ultrasonic vibration 1h then.Grind after the 70 DEG C of dryings of solution after ultrasonic vibration, the polyacrylamide powder of dried surface modification mixes homogenizing with sodium bicarbonate powder according to the ratio mechanical-physical of 1.0% (mass percent).
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108579300A (en) * | 2018-05-17 | 2018-09-28 | 柏美迪康环境科技（上海）股份有限公司 | A kind of steel plant's blast furnace flue gas wet purification processing method and system |
| CN112365789A (en) * | 2020-11-09 | 2021-02-12 | 中国科学院城市环境研究所 | Dynamic demonstration method and system for concentration and components of water-soluble ions of aerosol |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101513583A (en) * | 2009-02-16 | 2009-08-26 | 华中科技大学 | Coal-fired ultrafine grain chemical agglomeration promotor |
| CN104324590A (en) * | 2014-10-17 | 2015-02-04 | 安徽盛运环保工程有限公司 | Comprehensive absorption and deacidification system for dangerous and medical waste incineration flue gas |
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- 2015-12-02 CN CN201510889859.7A patent/CN105498435B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101513583A (en) * | 2009-02-16 | 2009-08-26 | 华中科技大学 | Coal-fired ultrafine grain chemical agglomeration promotor |
| CN104324590A (en) * | 2014-10-17 | 2015-02-04 | 安徽盛运环保工程有限公司 | Comprehensive absorption and deacidification system for dangerous and medical waste incineration flue gas |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108579300A (en) * | 2018-05-17 | 2018-09-28 | 柏美迪康环境科技（上海）股份有限公司 | A kind of steel plant's blast furnace flue gas wet purification processing method and system |
| CN112365789A (en) * | 2020-11-09 | 2021-02-12 | 中国科学院城市环境研究所 | Dynamic demonstration method and system for concentration and components of water-soluble ions of aerosol |
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