CN105642126A - Modification method of polypropylene hollow fiber membrane and application of polypropylene hollow fiber membrane in mercury removal of waste gas - Google Patents
Modification method of polypropylene hollow fiber membrane and application of polypropylene hollow fiber membrane in mercury removal of waste gas Download PDFInfo
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- CN105642126A CN105642126A CN201610003360.6A CN201610003360A CN105642126A CN 105642126 A CN105642126 A CN 105642126A CN 201610003360 A CN201610003360 A CN 201610003360A CN 105642126 A CN105642126 A CN 105642126A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D67/00—Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
- B01D67/0081—After-treatment of organic or inorganic membranes
- B01D67/0093—Chemical modification
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/64—Heavy metals or compounds thereof, e.g. mercury
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8665—Removing heavy metals or compounds thereof, e.g. mercury
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
- B01D69/08—Hollow fibre membranes
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
- B01D71/06—Organic material
- B01D71/26—Polyalkenes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2323/00—Details relating to membrane preparation
- B01D2323/38—Graft polymerization
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B01D2325/00—Details relating to properties of membranes
- B01D2325/10—Catalysts being present on the surface of the membrane or in the pores
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Abstract
The invention relates to a modification method of a polypropylene hollow fiber membrane and application of the polypropylene hollow fiber membrane in mercury removal of waste gas. The application mainly comprises the following steps: a metal catalyst is introduced into the surface or a duct of a membrane filament by virtue of a grafting method, mercury-containing waste gas is introduced into a mercury removal device, absorption liquid containing an oxidizing agent is pumped into a membrane reactor, absorption liquid flows in the tube side, and waste gas flows in the shell side, enters the tube side through the duct in the surface of the membrane filament and generates oxidation-reduction reaction with a catalyst in the tube side so as to remove Hg<0> by oxidizing Hg<0> into Hg2<+> which is soluble in water. Acid or alkali is added into the absorption liquid to regulate the pH value, the wall of a membrane reactor is made of a transparent material, the oxidability of an absorbent is improved by virtue of illumination, and finally the removal efficiency of Hg<0> exceeds 95%.
Description
Technical field
The present invention relates to the method for modifying of a kind of polypropylene hollow fiber membrane and the application in waste gas demercuration, particularly relating to a kind of duct at polypropylene hollow fiber membrane film silk and surface adopts Graft Method to introduce nanometer grade gold metal catalyst, increases oxidant to Hg in waste gas0The method of removal efficiency and application. The invention belongs to chemical industry and field of Environment Protection.
Background technology
Polypropylene hollow fiber membrane is the one of ultrafilter membrane, doughnut external diameter 450��460um, internal diameter 350��360um, thickness of pipe wall 50um. Ultrafiltration is dynamic filtration process, and being trapped material can get rid of with concentration, and pollution resistance is medium, can run continuously for a long time. The specific surface area of membrane contactor is big, loading density is high, gas-liquid two-phase contact area big, by catalyst load in polypropylene hollow fiber membrane film silk surface and duct, it is possible to increase the specific surface area of catalyst, thus increasing the reaction rate of oxidation reaction.
The coal of China is based on brown coal, and the mercury content in coal is 0.1��5.5mg/kg, and average content is 0.22mg/kg, and in coal combustion exhaust, the content of hydrargyrum is 9��23ug/m3, in waste gas, the form of hydrargyrum is varied from along with the difference of coal-fired kind. Elemental Mercury (Hg in waste coal waste gas0) account for the 20% of total mercury, bivalent mercury (Hg2+) accounting for the 35% of total mercury, particle mercury accounts for the 45% of total mercury; In waste gas without waste coal, Elemental Mercury constitutes about 65%, and bivalent mercury accounts for 10%, and particle mercury accounts for 5%; In brown coal waste gas, Elemental Mercury accounts for 85%, and bivalent mercury accounts for 10%, and particle mercury accounts for 5%. Hydrargyrum is a kind of severe toxicity non-essential element, is widely present in all kinds of surrounding medium and food chain, and its trace spreads all over the world each corner. Hydrargyrum can accumulate in vivo, it is easy to is absorbed by skin and respiratory tract and digestive tract. Hydrargyrum destroys central nervous system, and boil on the nape opposite the mouth, mucosa and tooth have harmful effect. It is exposed to for a long time in high hydrargyrum environment and can cause brain injury and death. Although hydrargyrum boiling point is significantly high, but mercury vapour saturated under indoor temperature has reached the several times of toxic dose.
Modal waste gas demercuration technology is absorption method, but adsorbent is difficult to regenerate and expensive, greatly increases demercuration cost. Oxidative absorption is a kind of efficient and economic demercuration mode. H2O2It is that one is very common and the extraordinary oxidant of oxidation effectiveness, it decomposes generation water and oxygen, while removing mercury pollution, do not introduce new pollution, Xi'an Communications University scholar delivers one section of article (Guangwenchenetal.) for 2014 on JournalofHazardousMaterials, uses H2O2Do oxidant and absorb the Hg in flue gas0, absorbing and liquid adds ion liquid addictive, demercuration effect reaches 98%, and ionic liquid is expensive, will significantly limit the practical application of this technology.Additionally, H2O2Oxidation susceptibility can be reinforced, can pass through to introduce illumination, add the methods such as Fe catalyst and make it produce the hydroxyl radical free radical that oxidisability is higher, Hunan University scholar delivers one section of article (FumanZhanetal.) for 2013 on ChemicalEngineeringJournal, uses UV/H2O2Hydrargyrum in system elimination flue gas, under optimum operating condition, demercuration efficiency reaches 98.5%.
Chinese patent application CN201410093649.2 discloses the absorption liquid of a kind of demercuration. De-mercury absorption liquid is mixed by glyoxaline ion liquid and hydrogen peroxide, wherein, and the mass ratio 9: 10��20 of glyoxaline ion liquid and hydrogen peroxide. This absorption liquid cannot recycle and need H in mixed liquor2O2Volume fraction is 37%, significantly increases cost; And this absorption liquid absorption rate is overly dependent upon the chemical characteristic of demercuration active component. The preparation method that Chinese patent application CN201310497560.8 discloses a kind of copper system mercury removal agent, prepares mercury removal agent by copper dip loading on carrier. Mercury removal agent is the same with absorbing liquid, it is impossible to recycle, it is necessary to prepare in a large number, add cost; The speed absorbing demercuration depends on the chemical property of active component. Need dependent reaction device to realize the optimization of mass transfer.
Chinese patent application CN201410047661.X discloses a kind of mercury removal device, and its reactor is similar to plate column, and perforate enters and passes through for flue gas onboard, and whole device has a lot of plate, occupies larger space; Adsorbent bag is adopted to adsorb demercuration, although the method compared with pulverized powder adsorbent, avoid the particle contamination of adsorbent, but adsorbent bag is difficult to recycling, need frequently to change, one very big difference of solid absorbent and liquid-absorbant is that the difference of mobility allows liquid-absorbant easily realize the seriality of demercuration operation, and this device is difficulty with the seriality of demercuration; Adsorbent is piled up packaging together simultaneously, it is difficult to ensureing that adsorbent and waste gas have sufficiently large contact area, the rate of adsorption of hydrargyrum depends on the chemical characteristic of adsorbent.
Chinese patent application CN201510092611.8 discloses a kind of absorption plant and the method for mercury vapour. Absorption plant includes filter, blower fan, membrane contactor, constant flow pump, deposition filter, absorption flow container. This device uses membrane reactor, has bigger mass transfer area. Waste gas flows through from tube side, absorbs liquid and flows through from shell side, adopt such technique, if exhaust gas flow increases, then has more waste gas without shell side, directly flows out from tube side outlet, reduces demercuration efficiency. Containing S in the absorbent that this device adopts2��, Hg0Hg is become after oxidized2+Can with S in solution2��Form HgS precipitation, although device has precipitation defecator, but the HgS precipitation produced still can polluted membrane, blocking the duct in membrane reactor, reducing effective mass transfer area of membrane reactor, thus reducing demercuration efficiency.
Therefore, existing technology is at elimination flue gas Hg0All more or less some weak point, in order to promote demercuration efficiency, and makes that equipment is simpler, economic benefit is better, it is necessary to prior art is proposed improvement project, develops the de-Hg that a kind of demercuration efficiency is high, equipment has simply again good economic benefits0Method and apparatus.
Summary of the invention
For the defect of prior art, polypropylene hollow fiber membrane is modifiied by the present invention, and is applied to the Hg in oxidative absorption elimination waste gas0.It is an object of the invention to, make full use of the feature that polypropylene hollow fiber membrane specific surface area is big, adopt Graft Method to introduce metallic catalyst strengthening absorbent on the surface of polypropylene hollow fiber membrane film silk and duct to Hg0Oxidation removal. Specifically including, adopt the mode of grafting to introduce, on polypropylene hollow fiber membrane film silk surface and duct, the functional group that can fix metallic catalyst, be re-introduced into metallic catalyst by functional group, metallic catalyst can be firmly fixed to above film silk very much. Utilizing the feature that the specific surface area of polypropylene hollow fiber membrane film silk is big, play the catalytic effect of catalyst to greatest extent, oxidation agent is to Hg0Oxidation removal.
The present invention is achieved by the following technical solutions:
A kind of polypropylene hollow fiber membrane modified, it is characterised in that described modified comprise the steps:
A, preparation modified liquid: by acrylic acid, potassium peroxydisulfate and ethylene glycol, deionized water mixing, in every 500ml mixing liquid, containing 50��150ml acrylic acid, 5��15 grams of potassium peroxydisulfates and 5��15ml ethylene glycol, all the other are deionized water;
B, polypropylene hollow fiber membrane film silk is immersed in the modified liquid prepared of step a, film silk 500 milliliters of mixed liquors of collocation of each thousand 30mm length, heat 2��4 hours at 80��90 DEG C, and pass into N2Protection, immerses CH after taking-up deionized water wash after 4 hours3CH2OH, washes away unreacted CH2=CHCOOH and by-product, take out and again film silk is immersed in the NaOH solution that pH is 9��13 after cleaning, the NaCl of 50��100mM is added again in NaOH solution, take out after 12 hours and clean and immerse in 0.01��0.2M ferric chloride solution 2��4 hours, then take out and clean again by film silk immersion 0.001��0.1M sodium hydroxide solution 1��2 hour, obtain the polypropylene hollow fiber membrane modifiied.
The present invention also provides for the application modifiied in waste gas demercuration of a kind of polypropylene hollow fiber membrane.
The application modifiied in waste gas demercuration of a kind of polypropylene hollow fiber membrane, it is characterised in that described application mode comprises the steps:
1) mercury removal device based on modified polypropylene hollow fiber membrane, is built, it is characterised in that described device includes:
One absorbs liquid storage tank 1, and provides the fluid flowmeter 3 that the pump 2, absorbing liquid controls to absorb flow quantity to be sequentially connected in reactor, fluid flowmeter 3 is connected with the import of membrane reactor 4, the outlet of membrane reactor 4 connects a waste collecting device 7, it is fixed in membrane reactor 4 through modified polypropylene hollow fiber membrane 5, the top of membrane reactor 4 side arranges an exhaust gas entrance 8, and the bottom of opposite side connects an exhaust gas processing device 6;
The number of above-mentioned membrane reactor 4 is 1��100, and type of attachment is in parallel or series;
The wall material of described membrane reactor is transparent material;
2) preparation absorbs liquid:
Regulating the pH value of oxidant 3��10, described oxidant is selected from H2O2��KMnO4��NaClO��Na2S2O4��NaCrO4In one or more, oxidant concentration is 5��500mmol/L, adds NaCl, Disodium oxalate. Na2C2O4, EDTA, in high molecular surfactant one in or multiple being configured to absorb liquid, affiliated NaCl, Disodium oxalate. Na2C2O4, EDTA, in high molecular surfactant one in or multiple total concentration in absorbing liquid be 0��1M;
3) hydrargyrum in elimination waste gas: pass into waste gas to described device from exhaust gas entrance, absorption liquid is pumped into membrane reactor from membrane reactor entrance, absorb liquid to flow in tube side, waste gas flows in shell side, and enters in tube side by the duct on modified polypropylene hollow fiber membrane film silk surface;Gas-liquid flow-rate ratio is 1:(10��100), initial hydrargyrum concentration is 0.01��1mg/m3, absorb liquid temp at 20��80 DEG C;
4) introducing illumination at membrane reactor place, the wave-length coverage of light is 110��760nm, and intensity of illumination is 0��500mW/cm2;
5) reacted tail gas empties after treatment.
The present invention has a major advantage in that:
(1) present invention introduces metallic catalyst on hollow polypropylene fibre film film silk surface and duct by grafting method, utilize the feature that the specific surface area of hollow-fibre membrane is big, play the catalytic effect of catalyst, the oxidation agent oxidation removal to hydrargyrum to greatest extent.
(2) present invention is at elimination Hg0Process in, it is possible to select free of contamination H2O2, new pollution will not be introduced, be economic and environment-friendly elimination Hg0Method.
(3) absorb in liquid and add appropriate amount of acid or alkali adjustment pH, increase oxidant to Hg0Oxidation removal ability.
(4) modified polypropylene hollow fiber membrane film silk can life-time service, it is not necessary to frequently change.
(5) whole apparatus structure is simple, and floor space is little.
(6) illumination can be introduced and carry out the oxidisability of oxidation agent to strengthen Hg0Oxidation removal.
(7) other pollutions such as the oxysulfide in waste gas, nitrogen oxides can be carried out oxidative absorption, it is possible to remove other dusty gass such as the oxysulfide of concentration 10��10000ppm and the nitrogen oxides of concentration 10��10000ppm simultaneously simultaneously.
In a word, the present invention need not change film silk frequently, and floor space is little, and can Hg in efficient, economic and free of contamination elimination waste gas0, it is Hg in elimination flue gas0A kind of very useful approach.
Accompanying drawing explanation
Fig. 1 is process chart according to an embodiment of the invention.
Wherein, 1: absorb liquid storage tank, 2: pump, 3: fluid flowmeter, 4: membrane reactor, 5: polypropylene hollow fiber membrane, 6: exhaust gas processing device, 7: waste collecting device, 8: exhaust gas entrance.
Fig. 2 is that in right figure, small circle represents the catalyst of introducing before modified (left side) and modified introduce the polypropylene hollow fiber membrane film silk schematic diagram on (right side) after catalyst.
Detailed description of the invention
Below by detailed description of the invention, the present invention is further elaborated.
Embodiment 1
Hg in simulated flue gas is removed at one0Process technique in, according to the method for the present invention, hollow-fibre membrane silk is modified, according to 400 ml deionized water, 100mlCH2=CHCOOH (Chemical Reagent Co., Ltd., Sinopharm Group), 7.7gK2S2O4(Shanghai Ling Feng chemical reagent company limited), 5mlC2H6O2(Shanghai Ling Feng chemical reagent company limited) configures mixed liquor, immerses in mixed liquor by polypropylene hollow fiber membrane film silk (China shipbuilding Industry Group Co., Ltd. 718th Institute), puts into and heat in baking box and pass into N after 5min2(SPRING RAINFALL AT SHANGHAI special gas company limited) protection, immerses CH after taking-up deionized water wash after 4 hours3CH2In OH (Shanghai Ling Feng chemical reagent company limited), wash away unreacted CH2=CHCOOH (Chemical Reagent Co., Ltd., Sinopharm Group) and by-product. Again film silk is immersed in NaOH (the Shanghai Ling Feng chemical reagent company limited) solution that pH is 10, solution adds the NaCl (Shanghai Ling Feng chemical reagent company limited) of 68.4mM, take out after 12 hours and clean with deionized water, then immerse the FeCl of 0.1M3In (Shanghai Ling Feng chemical reagent company limited) solution 2 hours, after taking-up deionized water wash, immerse in the NaOH solution of 0.01M, take out after one hour and clean with deionized water.
Device is put up by accompanying drawing to specifications, and oxidant used is H2O2(15.0mmol/L, Shanghai Ling Feng chemical reagent company limited), pH value is 5, and absorption flow quantity is 50ml/min, and simulated flue gas is N2, flow is 1L/min, and hydrargyrum concentration is 90ng/min, absorbs liquid and passes into from liquid inlet, and simulated flue gas passes into from gas access, and tail gas passes into the KMnO that mass fraction is 4%4(Shanghai Ling Feng chemical reagent company limited), 10%H2SO4Empty after (Shanghai Ling Feng chemical reagent company limited) solution.
Demercuration rate is ��=(Cin-Cout)/Cin�� 100%
In formula: �� is Hg0Removal efficiency; CinAnd CoutRespectively entrance, Hg in exit gas0Content.
Experimental result, demercuration rate is more than 82%.
Embodiment 2
Hg in simulated flue gas is removed at one0Process technique in, adopt and embodiment 1 in same method of modifying polypropylene hollow fiber membrane film silk is modified process.
Device is put up by accompanying drawing to specifications, and oxidant used is H2O2(15.0mmol/L, Shanghai Ling Feng chemical reagent company limited), pH value is 5, adds the NaCl (Shanghai Ling Feng chemical reagent company limited) and oxalic acid C of 4g/L2H4O2(Shanghai Ling Feng chemical reagent company limited), absorption flow quantity is 50ml/min, and simulated flue gas is N2, flow is 1L/min, and hydrargyrum concentration is 90ng/min, absorbs liquid and passes into from liquid inlet, and simulated flue gas passes into from gas access, and tail gas passes into the KMnO that mass fraction is 4%4(Shanghai Ling Feng chemical reagent company limited), 10%H2SO4Empty after (Shanghai Ling Feng chemical reagent company limited) solution.
Demercuration rate is ��=(Cin-Cout)/Cin�� 100%
In formula: �� is Hg0Removal efficiency; CinAnd CoutRespectively entrance, Hg in exit gas0Content.
Experimental result, demercuration rate has exceeded 95%.
Embodiment 3
Hg in simulated flue gas is removed at one0Process technique in, adopt and embodiment 1 in same method of modifying polypropylene hollow fiber membrane film silk is modified process.
Device is put up by accompanying drawing to specifications, and oxidant used is H2O2(15.0mmol/L, Shanghai Ling Feng chemical reagent company limited), pH value is 5, adds the NaCl (Shanghai Ling Feng chemical reagent company limited) and oxalic acid C of 4g/L2H4O2(Shanghai Ling Feng chemical reagent company limited), introduces analog light source, intensity of illumination 100mW/cm in experiment2, absorption flow quantity is 50ml/min, and simulated flue gas is N2, flow is 1L/min, and hydrargyrum concentration is 90ng/min, absorbs liquid and passes into from liquid inlet, and simulated flue gas passes into from gas access, and tail gas passes into the KMnO that mass fraction is 4%4(Shanghai Ling Feng chemical reagent company limited), 10%H2SO4Empty after (Shanghai Ling Feng chemical reagent company limited) solution.
Demercuration rate is ��=(Cin-Cout)/Cin�� 100%
In formula: �� is Hg0Removal efficiency; CinAnd CoutRespectively entrance, Hg in exit gas0Content.
Experimental result, demercuration rate has exceeded 98%.
According to the method for the present invention, demercuration efficiency has been above 90%, and if fibrous membrane silk is not modified, directly employing and above example same concentrations H2O2Doing absorbent, solution ph is adjusted to 3, adopts and H2O2The Fe of same concentrations2+Make catalyst, also do not introduce illumination, then demercuration efficiency only has 88%, less than 90%. Visible, polypropylene hollow fiber membrane is modified introduces catalyst and can be greatly improved the oxidation demercuration ability of system.
Claims (4)
1. a polypropylene hollow fiber membrane is modified, it is characterised in that described modified comprise the steps:
A, preparation modified liquid: by acrylic acid, potassium peroxydisulfate and ethylene glycol, deionized water mixing, in every 500ml mixing liquid, containing 50��150ml acrylic acid, 5��15 grams of potassium peroxydisulfates and 5��15ml ethylene glycol, all the other are deionized water;
B, above-mentioned hollow-fibre membrane silk is immersed in the modified liquid prepared of step a, film silk 500 milliliters of mixed liquors of collocation of each thousand 30mm length, heat 2��4 hours at 80��90 DEG C, and pass into N2Protection, immerses CH after taking-up deionized water wash after 4 hours3CH2OH, washes away unreacted CH2=CHCOOH and by-product, take out and again film silk is immersed in the NaOH solution that pH is 9��13 after cleaning, the NaCl of 50��100mM is added again in NaOH solution, take out after 12 hours and clean and immerse in 0.01��0.2M ferric chloride solution 2��4 hours, then take out and clean again by film silk immersion 0.001��0.1M sodium hydroxide solution 1��2 hour, obtain the polypropylene hollow fiber membrane modifiied.
2. the application modifiied in waste gas demercuration of polypropylene hollow fiber membrane as claimed in claim 1, it is characterised in that described application mode comprises the steps:
1) mercury removal device based on modified polypropylene hollow fiber membrane, is built, it is characterised in that described device includes:
One absorption liquid storage tank (1), the offer absorption pump (2) of liquid in reactor, the fluid flowmeter (3) controlling to absorb flow quantity are sequentially connected, fluid flowmeter (3) is connected with the import of membrane reactor (4), the outlet of membrane reactor (4) connects a waste collecting device (7), it is fixed in membrane reactor (4) through modified polypropylene hollow fiber membrane (5), the top of membrane reactor (4) side arranges an exhaust gas entrance (8), and the bottom of opposite side connects an exhaust gas processing device (6);
2) preparation absorbs liquid:
Regulating the pH value of oxidant 3��10, described oxidant is selected from H2O2��KMnO4��NaClO��Na2S2O4��NaCrO4In one or more, oxidant concentration is 5��500mmol/L, adds NaCl, Disodium oxalate. Na2C2O4, EDTA, in high molecular surfactant one in or multiple being configured to absorb liquid, affiliated NaCl, Disodium oxalate. Na2C2O4, EDTA, in high molecular surfactant one in or multiple total concentration in absorbing liquid be 0��1M;
3) hydrargyrum in elimination waste gas: exhaust gas entrance passes into waste gas to described device, pumps into membrane reactor by absorption liquid from membrane reactor entrance, absorbs liquid and flows in tube side, and waste gas flows in shell side, and enters in tube side by the duct on film silk surface; Gas-liquid flow-rate ratio is 1:(10��100), initial hydrargyrum concentration is 0.01��1mg/m3, absorb liquid temp at 20��80 DEG C;
4) introducing illumination at membrane reactor place, the wave-length coverage of light is 110��760nm, and intensity of illumination is 0��500mW/cm2;
5) reacted tail gas empties after treatment.
3. the application modifiied in waste gas demercuration of polypropylene hollow fiber membrane as claimed in claim 2, it is characterized in that, described step 1) mercury removal device in, the number of described membrane reactor (4) is 1��100, and type of attachment is in parallel or series.
4. the application modifiied in waste gas demercuration of polypropylene hollow fiber membrane as claimed in claim 2, it is characterised in that described step 1) mercury removal device in, the wall material of described membrane reactor is transparent material.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112892182A (en) * | 2021-03-18 | 2021-06-04 | 广东风和洁净工程有限公司 | Spray tower with hollow fiber membrane as filler and flue gas treatment system thereof |
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| CN101590370A (en) * | 2009-06-11 | 2009-12-02 | 上海交通大学 | The method of catalytically oxidizing elemental mercury by oxidant controlledly released by porous ceramic membrane |
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| CN103933880A (en) * | 2014-03-24 | 2014-07-23 | 贵州省材料产业技术研究院 | Preparation method of high-throughput hydrophilic modified polypropylene hollow fiber membrane |
| CN104722188A (en) * | 2015-03-02 | 2015-06-24 | 江苏汇维特新材料科技有限公司 | Mercury vapor absorbing device and mercury vapor absorbing method |
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| CN112892182A (en) * | 2021-03-18 | 2021-06-04 | 广东风和洁净工程有限公司 | Spray tower with hollow fiber membrane as filler and flue gas treatment system thereof |
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